who's running a 305 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bean · 11-20-2014, 10:18 AM

I have a chance to buy an extremely low mileage 305 for my 72. Just curious how many guys are running 305S and how they are working out for them. My although and psychological brackets from my original 350 will work on this right? Looking for feedback. Thanks alot

bean · 11-20-2014, 10:22 AM

That should say alternator and power steering brackets. Damn artphone

MARKDTN · 11-20-2014, 10:49 AM

Yes, your brackets should work fine. What is the 305 out of? 305 gets a bad name, but can be an OK engine. For instance the 305 from an 88 Impala has a roller cam and is the same longblock as an IROC Camaro.

bean · 11-20-2014, 11:00 AM

It's out of an 85 El camino

BlackedOut67shorty · 11-20-2014, 11:47 AM

I had a 305 once and its not a bad engine at all.

Tkmadone · 11-20-2014, 12:29 PM

I have a 305 in my C20 and it has plenty of power and runs great. I just put a TPI setup on it from junkyard parts and I am very satisfied with it.

**michael bustamante** · 11-20-2014, 01:25 PM

I have a 305 in my blazer 4x4. Runs great but it takes forever to warm up and tow power isint all that. But itll climb straight up a nasty rocky dirt road without a struggle

bean · 11-20-2014, 03:59 PM

What did you get your parts from

**special-K** · 11-20-2014, 09:00 PM

Small block Chevy motors are some of the greatest motors ever. 305s are small block Chevys. They are bigger than 265s and 283s and smaller than the rest. The bigger, the more power. It all depends on how much power you are looking for

Vintage Windmills · 11-20-2014, 09:15 PM

I have a 305 v6

Factory original engine that weighs about 800lbs!

Hubscrub · 11-20-2014, 09:46 PM

The best engines I've ever had was 305s and inline 6s my daily driver is currently 305. Also have a H.O. 305 in my 86 monte ss never had the valve covers off has 180,000 + runs like a top with 0 oil used between changes, and it was abused in my younger days. Always gonna be some haters but who cares not everyone is horsepower crazy.

Tkmadone · 11-20-2014, 09:59 PM

Quote:

Originally Posted by bean

What did you get your parts from

If you mean the TPI setup, it was off an, '86 Camaro.

kjdolphins · 11-20-2014, 10:17 PM

The 305 (TBI) in my 89' camaro runs like a champ. 150k on it, starts no matter what the temp, uses no oil, gets me fantastic gas mileage.

hamjet · 11-20-2014, 10:26 PM

I have an HO 305 with performer manifold, holley, cam and headers. runs great but I have something in the works for another transplant...

motorcritter · 11-20-2014, 11:16 PM

I'm dropping a Camaro 305 TPI and T5 in a '69 GMC. It's getting the '80 C20 front brake set-up, and the power steering, too. The body is really straight, needs paint, but the driveline sux! It's a very sick 307 with a 465, the power drums also suck and if I keep driving it as is, I'll have a set of Popeye arms! The 4.11 Dana will be just right for the set-up- that's about the only thing, driveline-wise, I'm keeping.

It's not that I don't like 350's or LS engines, it was sitting around and had a fresh overhaul and the GMC needed some help.

*ck5566* · 08-13-2016, 02:44 AM

Quote:

Originally Posted by special-K

Small block Chevy motors are some of the greatest motors ever. 305s are small block Chevys. They are bigger than 265s and 283s and smaller than the rest. The bigger, the more power. It all depends on how much power you are looking for

Actually you are somewhat half right. Here's the three engine specks.

265 bore is 3.75 & stroke is 3.00

283 bore is 3.875 & stroke is 3.00

305 bore is 3.736 & stroke is 3.00

350 bore is 4.00 & stroke is 3.48

So the 283 has the biggest Bore and the 305 has the Smallest Bore and both the 305 & 350 have the longest Strokes. This is why the 305 has more bottom end "grunt" than the 265 & 283.

Lets not forget the 307 its bore is 3.88 & stroke is 3.25. So there you have it. just saying too keep the records straight.

Oh yah all most forgot I too have a 305 came out of a 89 Firebird now in my 68 C10, haven't yet looked at the specs, not a bad engine though

palallin · 08-13-2016, 09:50 AM

Had a 305 in my truck when I first bought it. It was worn out, I suppose, but it was anemic, and it drank gas like a turbine. No idea what It came out of, but it would have made a decent boat anchor.

Jerked it out at the earliest opportunity and replaced with the family pet '69 327.

Had a great 307 once--even worn out, it embarrassed that 305.

YMMV, of course, but I wouldn't use a 305 on a lawnmower, I don't care what the badges on the fenders say. Just MNSHO, worth exactly what you paid for it.

J&J67C10 · 08-13-2016, 10:09 AM

305 stroke is 3.48

**68bowtie** · 08-13-2016, 10:12 AM

i have a mid 80's 305 in my 68. it runs great, but it's completely gutless.

100%Chevy · 08-13-2016, 10:53 AM

I have a 82,305 in my 68 until I rebuild the original 327.
It's a pretty good engine so far.
And,I have newer(87) 305 with the roller cam in my G-20 van that runs like a top.
305's got a bad reputation years ago because of soft cams that wore out really fast.
I've a 82,K-10 I bought new.I still have the 305 that came in it.Towed a travel trailer with it until the compression rings wore out,then went with a 454.
All small block Chevies are designed on the same basic block,they just shift the internals around to get different power ranges and fuel requirements to suit the application.
And,I also have a 351-C,V/6.
Mike.

/

midniteblues · 08-13-2016, 12:39 PM

A 305 isn't a bad engine in a daily driver. They can be set up too make more power like any other sbc.
But of course it's never gonna be a 350.

I severely abused the one in my 77 caprice and it allways ran good.

davepl · 08-13-2016, 01:05 PM

Quote:

Originally Posted by Tkmadone

I have a 305 in my C20 and it has plenty of power and runs great. I just put a TPI setup on it from junkyard parts and I am very satisfied with it.

If you've got 20 minutes to kill I'd love to see a thread showing what you used, how you did it, what it looks like, etc...

I assume some more modern V6 gave its electronics to the task?

57taskforce · 08-13-2016, 01:27 PM

Quote:

Originally Posted by davepl

If you've got 20 minutes to kill I'd love to see a thread showing what you used, how you did it, what it looks like, etc...

I assume some more modern V6 gave its electronics to the task?

Some 80s camaros had tpi 305s in them factory. Not from a v6. Just to clarify we are talking about the 305 small block v8 not the old gmc v6.

tommys72 · 08-13-2016, 02:45 PM

I had a 305 in an 88 Z28 that i drove in h.s. and then the first 4 years in the Marines. It was rebuilt before it went in the camaro, it wasnt fast but ran good. It went from Missouri to N Carolina and then the return trip to base about a 100 times. It racked up miles and ran like a top. No complaints about a 305 from me

GRX · 08-13-2016, 04:26 PM

305 are not all that bad. Always saw it's inception as a sensible move on GMs part since the same 350 rods could be used, well as the crank with minor balance changes. Let's face it. MUCH better engine than the tiny bore & valve wielding 267 it was designed to replace. Though they did share the same crank castings, with even more material removed from the crank counterweights.

11-20-2014, 10:18 AM	#1
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	who's running a 305 I have a chance to buy an extremely low mileage 305 for my 72. Just curious how many guys are running 305S and how they are working out for them. My although and psychological brackets from my original 350 will work on this right? Looking for feedback. Thanks alot

11-20-2014, 10:22 AM	#2
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: who's running a 305 That should say alternator and power steering brackets. Damn artphone

11-20-2014, 10:49 AM	#3
MARKDTN Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 2,144	Re: who's running a 305 Yes, your brackets should work fine. What is the 305 out of? 305 gets a bad name, but can be an OK engine. For instance the 305 from an 88 Impala has a roller cam and is the same longblock as an IROC Camaro. __________________ '83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project

11-20-2014, 11:00 AM	#4
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: who's running a 305 It's out of an 85 El camino

11-20-2014, 11:47 AM	#5
BlackedOut67shorty Registered User Join Date: Aug 2012 Location: error 404 location not found Posts: 816	Re: who's running a 305 I had a 305 once and its not a bad engine at all. __________________ 1995 s10 blazer 4.3 1967 c10 350/350 fleet short 1993 s10 blazer 4.3l 4l60 RIP 6/20/14 2000 mercury sable Thats a how I roll

11-20-2014, 12:29 PM	#6
Tkmadone Registered User Join Date: Aug 2009 Location: Simi Valley, CA Posts: 193	Re: who's running a 305 I have a 305 in my C20 and it has plenty of power and runs great. I just put a TPI setup on it from junkyard parts and I am very satisfied with it.

11-20-2014, 01:25 PM	#7
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,848	Re: who's running a 305 I have a 305 in my blazer 4x4. Runs great but it takes forever to warm up and tow power isint all that. But itll climb straight up a nasty rocky dirt road without a struggle __________________ 1967custom

11-20-2014, 03:59 PM	#8
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: who's running a 305 What did you get your parts from

11-20-2014, 09:00 PM	#9
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: who's running a 305 Small block Chevy motors are some of the greatest motors ever. 305s are small block Chevys. They are bigger than 265s and 283s and smaller than the rest. The bigger, the more power. It all depends on how much power you are looking for __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-20-2014, 09:15 PM	#10
Vintage Windmills Vintage 4x4s Join Date: Sep 2010 Location: Prior Lake, MN Posts: 4,305	Re: who's running a 305 I have a 305 v6 Factory original engine that weighs about 800lbs! __________________ 67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ) 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6

11-20-2014, 09:46 PM	#11
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: who's running a 305 The best engines I've ever had was 305s and inline 6s my daily driver is currently 305. Also have a H.O. 305 in my 86 monte ss never had the valve covers off has 180,000 + runs like a top with 0 oil used between changes, and it was abused in my younger days. Always gonna be some haters but who cares not everyone is horsepower crazy. __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14

11-20-2014, 10:17 PM	#13
kjdolphins Registered User Join Date: Mar 2014 Location: Ethan, South Dakota Posts: 93	Re: who's running a 305 The 305 (TBI) in my 89' camaro runs like a champ. 150k on it, starts no matter what the temp, uses no oil, gets me fantastic gas mileage. __________________ Current project: 1972 Chevy c-10 350 (700r4 hopefully) - "Lola" 68 Oldsmobile Delta Custom 455 78 Z/28 Camaro - "Rocky" 89 Camaro RS 305 TBI DD - "Betsy"

11-20-2014, 10:26 PM	#14
hamjet Registered User Join Date: Apr 2013 Location: South Westerlo, New York Posts: 1,325	Re: who's running a 305 I have an HO 305 with performer manifold, holley, cam and headers. runs great but I have something in the works for another transplant... __________________ Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB.

11-20-2014, 11:16 PM	#15
motorcritter Registered User Join Date: Mar 2012 Location: Boulder, CO Posts: 350	Re: who's running a 305 I'm dropping a Camaro 305 TPI and T5 in a '69 GMC. It's getting the '80 C20 front brake set-up, and the power steering, too. The body is really straight, needs paint, but the driveline sux! It's a very sick 307 with a 465, the power drums also suck and if I keep driving it as is, I'll have a set of Popeye arms! The 4.11 Dana will be just right for the set-up- that's about the only thing, driveline-wise, I'm keeping. It's not that I don't like 350's or LS engines, it was sitting around and had a fresh overhaul and the GMC needed some help. __________________ If 'that which does not kill me, makes me stronger', then I should be Superman by now!

08-13-2016, 09:50 AM	#17
palallin Registered User Join Date: Jul 2002 Location: St. James, MO Posts: 1,239	Re: who's running a 305 Had a 305 in my truck when I first bought it. It was worn out, I suppose, but it was anemic, and it drank gas like a turbine. No idea what It came out of, but it would have made a decent boat anchor. Jerked it out at the earliest opportunity and replaced with the family pet '69 327. Had a great 307 once--even worn out, it embarrassed that 305. YMMV, of course, but I wouldn't use a 305 on a lawnmower, I don't care what the badges on the fenders say. Just MNSHO, worth exactly what you paid for it. __________________ '69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt.



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08-13-2016, 10:09 AM	#18
J&J67C10 Registered User Join Date: Aug 2016 Location: central wi Posts: 22	Re: who's running a 305 305 stroke is 3.48

08-13-2016, 10:12 AM	#19
68bowtie Senior Member Join Date: Jan 2007 Location: Turlock, CA Posts: 8,615	Re: who's running a 305 i have a mid 80's 305 in my 68. it runs great, but it's completely gutless. __________________ Please help my sister in law with her battle with cancer https://gofund.me/902f6fce Survivor "Lil’ Mint" (67 c10 40k mile light green original paint) Project "C10 Fever" (68 factory black 396 swb) Project "Little Sister" (70 c10 blue original paint refresh) Project "Blue Bomb" (70 c30 blue original paint refresh) SOLD Project "Vitamin C" (71 c10 orange original paint refresh) SOLD

08-13-2016, 10:53 AM	#20
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: who's running a 305 I have a 82,305 in my 68 until I rebuild the original 327. It's a pretty good engine so far. And,I have newer(87) 305 with the roller cam in my G-20 van that runs like a top. 305's got a bad reputation years ago because of soft cams that wore out really fast. I've a 82,K-10 I bought new.I still have the 305 that came in it.Towed a travel trailer with it until the compression rings wore out,then went with a 454. All small block Chevies are designed on the same basic block,they just shift the internals around to get different power ranges and fuel requirements to suit the application. And,I also have a 351-C,V/6. Mike./

08-13-2016, 12:39 PM	#21
midniteblues Registered User Join Date: Jul 2011 Location: strausstown pa Posts: 3,394	Re: who's running a 305 A 305 isn't a bad engine in a daily driver. They can be set up too make more power like any other sbc. But of course it's never gonna be a 350. I severely abused the one in my 77 caprice and it allways ran good. __________________ 81 camaro 355 4/spd 342 posi my first love. 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover.

08-13-2016, 02:45 PM	#24
tommys72 Registered User Join Date: Jun 2012 Location: springfield mo Posts: 3,075	Re: who's running a 305 I had a 305 in an 88 Z28 that i drove in h.s. and then the first 4 years in the Marines. It was rebuilt before it went in the camaro, it wasnt fast but ran good. It went from Missouri to N Carolina and then the return trip to base about a 100 times. It racked up miles and ran like a top. No complaints about a 305 from me __________________ United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son

08-13-2016, 04:26 PM	#25
GRX Registered User Join Date: Jul 2010 Location: MD Posts: 1,937	305 are not all that bad. Always saw it's inception as a sensible move on GMs part since the same 350 rods could be used, well as the crank with minor balance changes. Let's face it. MUCH better engine than the tiny bore & valve wielding 267 it was designed to replace. Though they did share the same crank castings, with even more material removed from the crank counterweights. __________________ 1969 c-10 Step Side Long Bed. I-6 250cid = = 1969 Pontiac GTO hard top. 400, 4-speed.

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