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#1 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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sbc 307?
what do yall think about this motor? half decent or junk?
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I dont call it being young and dumb....I call it young and havin fun ![]() |
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#2 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: sbc 307?
My truck came with one and I took it off within a day or two after I got the truck and sold the motor right back to the guy I bought the truck from as it would not fit into what I wanted to build. With the amount of 350's out there I would not waste my time with either a 305 or 307....
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#3 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: sbc 307?
It's about 93 ci. too small. Haha!
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#4 |
Registered User
Join Date: Jul 2007
Location: Greenwater Lake, SK
Posts: 175
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Re: sbc 307?
We had one in a truck that we have had in the family since 69. It has never had anything done to it but regular maintenance. While it has been a very durable motor it is a long way from powerful...
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68 Camaro - 327 Original Red on Red Car 69 GMC LWB - Built 350 a Blast To Drive 69 GMC LWB - "Green Machine" One Family Truck 70 Mercury Marauder - Future Project Last edited by 69GMCor70Chevy; 12-10-2009 at 04:15 PM. |
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#5 |
Farmtruck desciple
Join Date: May 2009
Location: 90605
Posts: 158
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Re: sbc 307?
That all depends on what your goal is.
If you want to ugrade from an I6, it's a great motor. If you are looking for power and overall bottom end strength, It's an intermediate choice. The 307 came into existence in the late 60's/early 70's when Chevy was pressed to begin a phase of gas efficient, low emissions engines. Most were equipped with a 2 barrel carb and lousy heads, and low perfomace annotations. Of course any engine can be built well, but the 307 is a lesser foundation than the 350. In most builds, the overall costs are greater than a 350 build. 350's are common with good reason. If you have a good price and it fits what you are looking to do it it, there is nothing wrong with a 307. |
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#6 |
Registered User
Join Date: Oct 2008
Location: Brighton, TN
Posts: 1,267
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Re: sbc 307?
If you throw the original heads away and put in a decent set of flat top pistons a medium cam and a decent set of heads you cam match any 350 built with similar mods. Plus it uses a 327 crank. You can bore it from a stock 307 to a stock 350 and use stock 350 pistons. Lots of great options for an under appreciated motor. Dont get me wrong Id take a 400 over it any day of the week but everyone and their neighbor has a 350 nowadays and the 307 is way more durable.
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#7 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: sbc 307?
the 307 out of my truck ran like a sewing machine, the guy I sold it to is using it on a 32 roadster set up as a cruiser. If you want to just have a nice driver then there is nothing wrong with it, now If you want to haul ass you go with a small block 400 like I did...
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#8 |
Registered User
Join Date: Dec 2006
Location: Porter Ranch, CA
Posts: 978
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Re: sbc 307?
I agree with the above comments. A similarly built larger displacement engine will run away and hide from it, but the 307 can deliver slightly better mileage. I used to get around 14 - 15 with no OD in my old '69. The original engine had a very hard 150,000 on it when my dad rebuilt it. The rebuilt engine made another 12 years and 200,000 miles (the owner/my neighbor ran it for several years with no air cleaner and finally sucked something down the chute and scored a cylinder!!). The third engine is going great and the truck has around 425,000 miles on it!
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#9 |
Suburban Hick
![]() Join Date: Aug 2008
Location: Altoona, IA
Posts: 810
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Re: sbc 307?
I also agree they don"t have much power at all, but my brother did mangae to blow the rearend out of our 69 with it.
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Mathew 1947 Chevy 3600 1951 GMC 100 1969 Chevy C-10 396/500hp TH400 lowered 4" 1968 Imapla Custom 396/325hp TH400 "Grandmas Car" 1976 Crew Cab 4x4 diesel http://67-72chevytrucks.com/vboard/s...d.php?t=488505 1978 Chevy K-10 454 1983 S10 4x4 "Bumblb" (Grandpa's truck) 1993 Chevy S10 V8 conversion 1990 Ford Probe Gt 1992 Dodge W-150 "Old Man's Truck" 1992 Pontiac Grand Prix SE 1992 Mercury Grand Marquis-Mercruiser 2000 Ford F150 (Currently my mother drives this) 1946 Farmall H with Stan Hoist loader 1965 John Deere 110 1961 Wheel Horse " Rat Tractor" |
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#10 |
Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: sbc 307?
its the base v8. if it runs good your bucks ahead. They dont tax the drivetrain. Any 350's gonna need a rebuild and you can never just leave it at that so cost's 'll soar. then there is fuel. How many people wanna bet gas will go past 4 bucks again. I just bought a 72 with a 307 and 88172 miles on it. A new timing chain set, oil pump and damper is all its gonna see. Maybe a set of dual exhuaste.
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#11 |
Registered Chevy Owner
Join Date: Aug 2008
Location: Snohomish, wa
Posts: 1,557
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Re: sbc 307?
I'm using a 307 in my '51 and I did some research and with a few mods I can get 300hp out of it. It's stock at 200hp, and I'm only building it for a cruiser. From what I've heard from a lot of the older fellas that I worked with is that they used a 307 in their race cars and they never have any problems with them. They can rev up high and they said that the 307 is pretty much bullet proof.
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Love is fleeting, but Chevy trucks are forever!!!! ![]() 1970 Chevy CST C10 long box 350/400 ![]() 2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350 |
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#12 |
Registered User
Join Date: Mar 2009
Location: USA
Posts: 255
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Re: sbc 307?
I friend of mine had one in his Nova back in highschool. It had a 4 speed, 4 barrel carb, intake, cam and headers. He was running the 1/4 mile in the low / mid 14's. I can still remember the last day of school of senior year. He did a burnout for about 100 feet.
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#13 |
I dun gradjiated collij!!!
Join Date: Jan 2006
Location: St. Helens Oregon
Posts: 1,751
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Re: sbc 307?
I'm not gonna get into a pi$$ing match with the 350 fan boys but I do know that I have a set of back tires that frickin' hate my 307....
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Built NOT Bought. Viper Red 1971 LWB C10 355 Vortec W/700R4 4/5 drop AKA Screamin' You are missed!
2006 F150 XLT 5.4L Triton Rollin' on 22s the "F1" 67 C20 PS/AC/327/TH400 we call 'er "Bessie" 67 Malibu PS/ZR1-LS1 Brakes/350 Vortec/700R4 2/2 drop on 18" 338s - Tracy's "Boo" Boosted '67 Cougar EFI 5.0 HO roller motor/T5/8.8 Tracloc/ 4 wheel disks - "Project Panther" 79 Honda Z50 - stretched, cafe'd and hotrodded 125CC Lifan/5spd FEAR THE MONKEY! |
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#14 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: sbc 307?
The 307 was a way to use up 283 blocks and 327 cranks laying around when they used 327 blocks and 283 cranks to make 302's for the Z28 Camaros.
You can bore a 283(or307) block out .125" over, which would make it a 4.00" bore. With a 3.25" crank, voila! You have a 327. Also, 307's came from the factory with flat top pistons. The biggest downfall to them was the wheezy heads that came on them. A good set of heads, cam, headers, intake, and right sized carb, it should make a decent screamer.
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#15 |
Registered User
![]() Join Date: Jan 2009
Location: marion nc
Posts: 588
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Re: sbc 307?
im gonna rebuild the one that came in my 69. lots of people hate these motors,and i dont know why. they are tough and dependable. i have owned a few in these trucks with 307s and YES they are NOT fire breathing dragons. but i just like to cruise. you can make one sound good with a little cam and headers. just my .02 cents worth
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69 short fleet 350/350 "under construction" 70 short step 307/3 speed |
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#16 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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Re: sbc 307?
yup all im needing is a cheap motor that will get decent mileage and be able to drive around with a hay bale on the back. Im building my dad a new truck. His truck that he started to haul hay with caught on fire almost a year ago. He had the truck for almost 35 years...
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I dont call it being young and dumb....I call it young and havin fun ![]() |
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#17 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: sbc 307?
I like`em for what they are.They are fun to pep up,too.They are 1/2 decent.
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#18 |
Registered User
Join Date: Jan 2009
Location: Sandersville, GA
Posts: 298
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Re: sbc 307?
Had 307/3 ott in a'71 chevelle. Wore out several sets of tires, had to reline the brakes, broke the shifter collar on the column from power shifting. Traded it with 85,000 miles, and had never touched the engine.
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How 'Bout them Dawgs! ![]() '10 Traverse LTZ 03 Silverado Z71 ext cab 99 Yamaha Grizzly 600 72 C10 350/350 sportside bed. 68 C30 flatbed. 350 4-speed. "I've got a good memory, it's just short!" |
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#19 |
Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: sbc 307?
A while back I was looking for a 307 to use the crank out of it in my 361 sbc.
350 block 307 crank 327 pistons and 5.7 rods and you have yourself a 327 four bolt main. .030 over 332ci .040 333ci .060 337ci.
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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#20 | |
Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: sbc 307?
Quote:
Parts for a 350 will be cheaper and you would probably be better off in the long run with a 350 but if you have it, use it. |
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#21 | |
Registered User
Join Date: Dec 2006
Location: Porter Ranch, CA
Posts: 978
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Re: sbc 307?
Quote:
I think one of the best and most accurate comments is that a 307 is less taxing on the entire drivetrain because it's a little less potent. The '69 that my dad bought with a 307 is now owned by my neighbor and has something over 425,000 miles on it. 1st engine made 150,000 miles of being constantly loaded (wish I was!), but well maintained. The 2nd engine made about 250,000 miles of total neglect in terms of maintenance. Now the third engine has about 20-30K on it. What's more impressive is the SM465 and Eaton rear ends have NEVER been opened up! Both are still in fairly good shape! |
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#22 |
ENGINE BUILDER
Join Date: Apr 2006
Location: Shortsville n.y.
Posts: 344
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Re: sbc 307?
I put 305 4 barrel heads on mine with a crane 274 Energizer and it ran real good. It is still in my garage and will make a good engine for a Cheap project.
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#23 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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Re: sbc 307?
alright thanks everyone ill go through with the 307 are the parts about the same price as a 350?
__________________
I dont call it being young and dumb....I call it young and havin fun ![]() |
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#24 |
Registered Chevy Owner
Join Date: Aug 2008
Location: Snohomish, wa
Posts: 1,557
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Re: sbc 307?
I've looked at Summit for some parts and they are the same price for any SBC. But I'm not gonna say that's true 100% of the time.
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Love is fleeting, but Chevy trucks are forever!!!! ![]() 1970 Chevy CST C10 long box 350/400 ![]() 2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350 |
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#25 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: sbc 307?
Stock rebuild stuff should be similar in price. Most companies aren't gonna have hi-po 307 pistons laying around on their shelves. A good set of pistons may set you back more if you would actually go that route.
Anything else is gonna be standard sbc stuff. Also, check around with some local machine shops. Sometimes, they have stuff laying around that someone ordered but never used or paid for.
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