Join Date: Feb 2006
Location: Santa Rosa Beach, Florida
Re: 434 SBC heads?
Ok to be more specific. I have a 350 stock rebuild with dished cast 4 valve relief pistons, a mild hydraulic flat tappet cam and 76cc smog heads producing what I would gather is 8:1 compression. This is in a 70 Chevelle convertible I plan to use once again as a daily driver. The motor has maybe 40K on the rebuild. As I resurrect this car Im thinking I should put on some better heads to raise my compression ratio for the purpose of creating a more efficient motor and probably yeild a litt le more power while Im at it.
I was planning on Vortec but best Ive found it $550, then I need self aligning rockers, a new intake, new vavle covers and while Im at it push rods.
My other option is a Chevrolet 305 style head with a 65cc combustion chamber.
Aerohead has these heads which are resurfaced, new 2.02/1.60 or 1.94/1.50 SS vavles, 3 angle valve job, new springs etc etc. I was told by Aerohead they are casting 434 which is the same as most 305 heads but a heavier stronger head that are not prone to cracking like most 305 heads. This should put me at a much better compression ratio and the price for the heads is $399 for the pair no core required. I dont know a thing about these heads but know pretty much anything is gonna be better than my 76cc smoggers.
So any suggestions and or insight on these 434 castings?