v6 v 305 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**old Rusty C10** · 10-08-2003, 10:40 PM

ive got a 86 custom deluxe with the 4.3 motor in it and a th350 trans. Lately ive been driving it alot and i find it kinda underpowered, especially when i take off from a dead stop or want to merge on the highway. I have an extra 305 motor in the garage that allegedly runs well. would i find that much more power outta the 305 or should i just save my pennies and go for a 350 next year

Mike76251 · 10-09-2003, 02:41 AM

That 305 V6 is a classic alright......
They make good torque but are a very heavy engine and don't give modern fuel economy.
I would go with a 350 V8 no doubt if that what I had to choose from.

Gibble · 10-09-2003, 09:29 AM

Umm...a 305 is a v8, his 4.3 is a 6cyl

**old Rusty C10** · 10-09-2003, 10:28 AM

i have a 4.3 v6 in it now. it runs and drives fine but it is kinda underpowered for my sometimes heavy right foot. I was thinking of replacing that 4.3 V6 with a 305 V8 i have in the garage. I was wondering if id see much of a performance difference or should i wait to buy a 350 in the spring?
Sorry for the confusion guys

Low87on20s · 10-09-2003, 10:40 AM

If you change to the 305 now and still aren't satisfied with the performance, you will probably change to the 350 anyway. I'd save yourself some trouble, wait for the 350, and just perform the V8 upgrade once. That's just my opnion.

Jonboy · 10-09-2003, 10:41 AM

I would just hold out for the 350. On the brighter side, the 4.3 is a 350 just missing 2 cylinders, so most of your accessories should fit. Is the 4.3 a TBI engine? If so, I would definitely just wait. You would need to find a 5.7 ecm to use as well.

VTKidder · 10-09-2003, 10:45 AM

Quote:

Originally posted by Gibble
Umm...a 305 is a v8, his 4.3 is a 6cyl

Gibble.....GM did come out with a 305 V6. A common misnomer much like the Chevy 302 that everyone answers with "302? Only f*rd made a 302.

I'm not positive on the years and models it came in, but was around through the 60's found in half tons all the way up to the 6500 series trucks (a 478 V6 was available in 1964

). Here's a pic of the 305...spread the word, they're cool rare engines.

CRRoy71 · 10-09-2003, 10:46 AM

I have a '92 chevy truck with the 4.3 in it, and my '86 Blazer with the 305. Honestly, I can not tell that much difference between the two.

I say wait for the 350.

Low87 · 10-09-2003, 11:08 AM

From my experience, the 305 will give you the power of a V6 and the gas mileage of a V8. Wait for the 350!

Jonboy · 10-09-2003, 11:14 AM

that 305 looks almost like a big block in those pics, until you look at the exhaust! I had one in a 69 GMC 1 ton, so they were produced until at least then. Good low end, but changing the plugs was kind of a pain when you dropped one.

low 84 · 10-09-2003, 01:41 PM

Quote:

Originally posted by Jonboy
that 305 looks almost like a big block in those pics, until you look at the exhaust! I had one in a 69 GMC 1 ton, so they were produced until at least then. Good low end, but changing the plugs was kind of a pain when you dropped one.

its like a 409 with 2 cylinders hacked off.

bigblock73 · 10-09-2003, 01:44 PM

I agree with the rest, save up for the 350...you will be much happier!

Make a coffee table out of that 305...remember that thread?

-Jeff

1969 GMC · 10-09-2003, 02:25 PM

Quote:

Originally posted by Jonboy
that 305 looks almost like a big block in those pics, until you look at the exhaust! I had one in a 69 GMC 1 ton, so they were produced until at least then. Good low end, but changing the plugs was kind of a pain when you dropped one.

http://www.6066gmctrucks.org/EngineData.htm

check out this website, some cool stuff here. there was a 351E V6 available in 66 (dunno if this carried over to 67 tho). 220 hp, 320 tq.

they also made a 702 V12 by attaching two 351's!!

**old Rusty C10** · 10-09-2003, 04:23 PM

ok yall convinced me im saving for the 350. Luckilly my current set up is a carbuerated system and ill keep a carbuerated system so it should be a pretty easy swap. Im planning on getting some kind of crate motor prolly from summit or jegs or something . Thank you all for your input!

10-08-2003, 10:40 PM	#1
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	v6 v 305 ive got a 86 custom deluxe with the 4.3 motor in it and a th350 trans. Lately ive been driving it alot and i find it kinda underpowered, especially when i take off from a dead stop or want to merge on the highway. I have an extra 305 motor in the garage that allegedly runs well. would i find that much more power outta the 305 or should i just save my pennies and go for a 350 next year __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

10-09-2003, 10:28 AM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	i have a 4.3 v6 in it now. it runs and drives fine but it is kinda underpowered for my sometimes heavy right foot. I was thinking of replacing that 4.3 V6 with a 305 V8 i have in the garage. I was wondering if id see much of a performance difference or should i wait to buy a 350 in the spring? Sorry for the confusion guys __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

10-09-2003, 10:40 AM	#5
Low87on20s Live from Atlanta Join Date: May 2003 Location: Atlanta, GA Posts: 511	If you change to the 305 now and still aren't satisfied with the performance, you will probably change to the 350 anyway. I'd save yourself some trouble, wait for the 350, and just perform the V8 upgrade once. That's just my opnion. __________________ Paul

10-09-2003, 10:41 AM	#6
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	I would just hold out for the 350. On the brighter side, the 4.3 is a 350 just missing 2 cylinders, so most of your accessories should fit. Is the 4.3 a TBI engine? If so, I would definitely just wait. You would need to find a 5.7 ecm to use as well. __________________ 1974 Jimmy- 5.3/4L80e/NP241

10-09-2003, 10:46 AM	#8
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	I have a '92 chevy truck with the 4.3 in it, and my '86 Blazer with the 305. Honestly, I can not tell that much difference between the two. I say wait for the 350. __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

10-09-2003, 02:41 AM	#2
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	That 305 V6 is a classic alright...... They make good torque but are a very heavy engine and don't give modern fuel economy. I would go with a 350 V8 no doubt if that what I had to choose from.

10-09-2003, 09:29 AM	#3
Gibble mmmm....Rye and Coke Join Date: Apr 2003 Location: MB, Canada Posts: 485	Umm...a 305 is a v8, his 4.3 is a 6cyl

10-09-2003, 11:08 AM	#9
Low87 been here longer than Liz Join Date: Feb 2000 Location: Broken Arrow, OK Posts: 2,437	From my experience, the 305 will give you the power of a V6 and the gas mileage of a V8. Wait for the 350! __________________ ~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin

10-09-2003, 11:14 AM	#10
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	that 305 looks almost like a big block in those pics, until you look at the exhaust! I had one in a 69 GMC 1 ton, so they were produced until at least then. Good low end, but changing the plugs was kind of a pain when you dropped one. __________________ 1974 Jimmy- 5.3/4L80e/NP241

10-09-2003, 01:44 PM	#12
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	I agree with the rest, save up for the 350...you will be much happier! Make a coffee table out of that 305...remember that thread? -Jeff

10-09-2003, 04:23 PM	#14
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	ok yall convinced me im saving for the 350. Luckilly my current set up is a carbuerated system and ill keep a carbuerated system so it should be a pretty easy swap. Im planning on getting some kind of crate motor prolly from summit or jegs or something . Thank you all for your input! __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

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