I HAVE A 1968 IMPALA WITH A 307 AND PG TRANS. MY ENGINE HAS HEADERS, DUAL EXHAUST, 4BBL CARB (EDELBROCK 600CFM) AND A LITTLE BIGGER THAN STOCK CAM. IT'S PERFORMANCE IS BETTER THAN ANY 307 I HAVE EVER DRIVEN, BUT I THINK A STOCK 2BBL 327 WOULD STILL OUT PERFORM IT. I WOULD NEVER BUILD UP A 307 MYSELF. I BOUGHT MY IMPALA AS A DAILY DRIVER LARGELY BECAUSE THE DRIVETRAIN WAS FRESHLY REBUILT. I WOULD THINK RATHER THAN TRYING TO SQUEEZE POWER OUT OF THE 307, YOU MIGHT BE BETTER OFF WITH A STOCK 327/350. YOU WOULD SPEND THE SAME MONEY TO UPGRADE THEM AS YOU WOULD THE 307 AND THE PERFORMANCE WOULD BE TONS BETTER. THIS IS JUST MY OPINION, BASED ON MY OWN EXPERIENCE.

I posted this build up thread and link at least a year ago. 315 HP from a boat anchor isn't too bad. 

http://canadianponcho.activeboard.com/t19740854/307-build-up-interesting/

The 307 was never intended to be a performance engine just like the 305 (except L69) it was a bread and butter good fuel mileage V8. People say they were dogs on fuel but really, installed in an Impala ya, it comes down to power to wieght. In a Nova, or Chevelle or pick up different thing. The thing is there are about 10,000,000 of them out there so you can get it cheap and for a few bucks you can have 300 HP. Afterall it is a small block and parts are everywhere. 

I think you will find the article I posted above interesting.  It is always cool having something different. Anybody can have a 327 or 350. 

 

-- Edited by 73SC on Saturday 26th of November 2011 08:37:23 PM

not wanting to burst any ones bubble but a 307 is not a performance motor its a gm stopgap attempt combing a 283 and 327 unfortunetly it losses the good attributes of both motors, i would spruce it up a bit with boltons and keep my eyes open for the right 327 to come along. They are still around, then move the bolt ons over.

Well, if you want, I have a fairly complete 67 327 I bought a long time ago with plans of using it in my Acadian. However, I used a real Nova/Acadian block (they are different) so there it sits, in the way ,year after year!

I am told it ran ok but needs a rebuild. It has no carb, no brackets on it.

If you are interested, we can talk about it on Tuesday. I am not looking to profit on it but I won't be willing to take a loss on it either!

Neat thing is, it's from a 67 so would be correct for your car.

65wagon wrote:

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not wanting to burst any ones bubble but a 307 is not a performance motor its a gm stopgap attempt combing a 283 and 327 unfortunetly it losses the good attributes of both motors, i would spruce it up a bit with boltons and keep my eyes open for the right 327 to come along. They are still around, then move the bolt ons over.

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Agreed, not a performance motor but not as bad as it's made out to be. I had an 88 Caprice wagon with a 307 4 bbl Olds moto and an 89 Caprice cop car with a 305 SBC TBI motor. I'd take the 307 2 bbl over those dogs any day. 

65wagon wrote:

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sounds like a darn good plan i will have some 68 four barrel suff off my 327 when i start to tare into it and if anyone wants the recipe to build a good 327 combo that wont break the buget, you guys runny quads dont know how luky you are

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 I'm running a home built 327 ( 350 block / 307 crank )   with 882 heads, a 67  4 bbl, and a 67 396 Quadrajet.  nice RV type cam,  I can look up the specs.

IT has lots of grunt and pulls hard up to 5000 RPM. backed by a glide and 3.23 gear with a tall tire.. 

It has impressed the heck out of me ! IT's in my 64 Custom Sport !

Single best thing you can do for picking some performance for driving around in a full size is ditch the powerglide and put in a TH350 tranny. Bolts in, don't have to move crossmember or shorten drive shaft. Especially with a mini mouse like 283 or 307. Lower 1st gear gets the big barge moving easier.

Of course adding an overdrive is even nicer, but is more work.

-- Edited by DANO65 on Monday 28th of November 2011 12:06:28 AM