mystery of the 307
03-28-2006, 04:15 PM
#21
Originally Posted by CarelessAndImprudent
The 307, 327, and 350 are all the same. The difference is bore and stroke. Forget the 350 crate, punch the bore of the 307 to 327, and get a set of high flowing heads (double hump heads are cheap), and get a good cam, intake, and carb. It'll be cheaper than a good crate and I guarantee if you build it right, the 327 will kill most of the 350s you'll encounter and run with the rest. I have a built 327 in my '69 Camaro backed by an m21 and 3.73s out back and I have no problem against ls1s, lt1s, and 350s. Not saying it can't be beat, but it's a lot cheaper and the 327 really likes to rev.
imo seeing as how i rebuild sbc and ls1 all day for a living
i recommend u look into a vortec engine from the mid 90's
came with roller cams and the vortec heads
most any machine shop worth using can machine the heads to use
screw in rocker studs
look for 350 4in bore engines and not the 305 engines
this engine can make some good power if u select the right combo
with of course a DP 4150 650cfm and dual plane intake
03-28-2006, 04:20 PM
#22
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Originally Posted by NemeSS
must be a slow sleepy neighborhood
imo seeing as how i rebuild sbc and ls1 all day for a living
i recommend u look into a vortec engine from the mid 90's
came with roller cams and the vortec heads
most any machine shop worth using can machine the heads to use
screw in rocker studs
look for 350 4in bore engines and not the 305 engines
this engine can make some good power if u select the right combo
with of course a DP 4150 650cfm and dual plane intake
imo seeing as how i rebuild sbc and ls1 all day for a living
i recommend u look into a vortec engine from the mid 90's
came with roller cams and the vortec heads
most any machine shop worth using can machine the heads to use
screw in rocker studs
look for 350 4in bore engines and not the 305 engines
this engine can make some good power if u select the right combo
with of course a DP 4150 650cfm and dual plane intake
04-02-2006, 11:04 AM
#23
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Originally Posted by my68camaro383
well of course any head will flow better on a larger bore, but what he said is that you can't go over a 1.72 inch valve, which is BS when you step it up to a 4in bore which is what a 327 is.
A couple of questions regarding the Chevy (not the later Olds) 307:
1) Why were there no high performance versions made?
2) Why was production discontinued after 1973?
04-03-2006, 01:39 PM
#24
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Originally Posted by CarelessAndImprudent
Nope, not slow and I never said my car was the quickest around. I'm just saying that for the money it would be a good investment. Besides, if you you build sbc all day, then you should know what the 327 is capable of.
the 327 wouldnt be used in drag racing today if it werent a good powerplant. theres a shitload of things you can do. hell i have a bunch of 383 parts if you were interested. you have a good starting point, go from there. the vortec heads are decent heads, but theres better out there. 