[68-307Chevelle]

Any ideas you may have are welcome, I am starting with body work..please help with engine and trans..Currently its got the original 307 engine works fine little trouble but easy fix, I want more power. I am not familiar with this engine and don't know how far I can take it COST IS A FACTOR in this rebuild. so the idea is more power with 307 vs new engine, cost effective?:hurray: Thanks for helping.

 

[VinceS427bb]

welcome to team chevelle.
you will want to do a search of the site as several 307-engines were discussed.
just type "307" and hit search.
good luck

 

[D Stroud]

Any ideas you may have are welcome, I am starting with body work..please help with engine and trans..Currently its got the original 307 engine works fine little trouble but easy fix, I want more power. I am not familiar with this engine and don't know how far I can take it COST IS A FACTOR in this rebuild. so the idea is more power with 307 vs new engine, cost effective?:hurray: Thanks for helping.

I beleive the general thoughts here are, bag the 307 and build a 350. While the 307 will respond with the usual bolt ons, (intake, headers etc.) it will still be slow compared to the same efforts put into a 350.

The compontent will cost the same to build up a 307 or the 350. But, you will get much better performance from building the 350.

Another thought, what rear gear are runnin? A swap to a taller gear like say 3.73 or so will make it feel like it has a new engine if you are currently runnin a 3.08 or 2.76 gear which is pretty much standard with the wagon. Course your gonna pay for it with less gas milage with a taller gear.

But, most of us don't build these things with milage in mind.

 

[wills65]

307's are ok, but just that, ok. I would ditch the 307 and try to build something bigger. Go with a 350 at the least. And yeah, gears will help alot

 

[Professor_SS]

all the stuff that goes on a pre 86 350 as far as bolt on will go on a 307. get an intake and a 4 barrel, throw some headers on it and an HEI and run the snot out of it. They respond reasonably well to those few mods. A stock 307 in 70 made 200 hp. lets say 185 if it is worn a bit. The low buck 350 crate is 290. you can get maybe 240 or fifty with those parts on the 307. Then later when you have the bucks for a crate the intake, hei and headers will bolt right up to the pre 86 350. I have a 1970 307 with a 4 barrle and hei in my 78 truck and it is respectible for a beater and it gets decent gas milage.

 

[camarofreak]

my brother went from a 350 to a 454 and has a rebuilt 350 cheap air cleaner to pan with about 5000 miles since rebuilt!! we are about 1 hour south west of chicago.
you can drop 1200 on that 307 and still not have the power of this 350
here is a link to the ad
http://www.chevelles.com/classifieds/showproduct.php?product=23527&cat=500

 

[RyanNilcea05]

I'd recomend keeping it a 307, since it's the original engine.

 

[68KMENO]

you say it runs fine .......... so I say run it !!

till its dies !!

then replace it with a 383 that you'll build while your saving money driving around your 307