I have a '65 Skylark with the 300 engine (2 Barrel) and ST300 tranny. Heres the plan: Get a Holly 500cfm carburetor or a 600 if I can find a 4 barrel intake Raise compression to 11:1 Get a Crower Cam w/ .488/.501 lift Change ignition from points to electronic Get Poston Headers Get a TH350 w/ 2300-2800 stall (not sure on the stall, input please) Change rearend gears to 3.55 This combo seems almost too simple but I don't know what other performance options I have, exept the ones I can't afford (fabrications).
Sounds like it'ld be a fun little car to drive! With such big cam in such a small motor you way want alittle more gearing. What are the rest of the specs on that cam?
Would recommend having dual exhaust made up. The only 4 bbl intake manifold that will fit your engine is from a 1965 300. Sometimes, they are hard to find. Postons stopped making 300/340 headers a couple of years ago. No other alternatives that I know about. The more you upgrade your ignition, the better. Keep in mind that 11:1 compression needs a racing fuel mix to control the pinging. If your intending this to be a street car, you make that your lowest priority.
Cam info: 112* lob center 220* 226* duration at .050 .488" intake .501" exhaust There was a 300 block that came with 11:1 compression so I figured it would be ok. Maybe I'll find some 10:1 pistons. I know someone who can fabricate parts so maybe I can get him to make headers and an intake for me. I'm glad I posted this, I thought I was just about done finding parts.
You are correct in that the 300 Buick in one year (64) could be had with 11 to 1 compression. However, remember that back then , you could buy 100 plus octane fuel at the pump as well. Not so today. You could have some headers fabbed up, but I doubt you'll find anybody to just fab you up an intake. Check with Poston's again on the headers, I think I heard that they were going to reintroduce the 300/340 headers. Jim Burek
cool sounds exactly like my first combo and it ran 14.20's well very close 9.5:1 comp. poston headers and cam .498 lift fact 4 bbl intake small Q jet th350 2800 stall conv. 3.64:1 rear3200# carcould drive it anywhere
