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Old 04-22-2011, 01:50 PM
stealthy1991 stealthy1991 is offline
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SBC build questions

Ok I've posted some questions on my build before but have gone a different route since then. I had a newer truck block that ended up being a 2 bolt main so instead I bought a 1974 350 4 bolt main short block .020 over .010 square decked. The pistons are Servolite 1436-020 which are .031 in the hole. So the questions i have are... What kind of compression can I expect with these Vortec heads?
190cc Intake Runners, 64cc Chambers, 1 piece stainless valves; 2.02 Intake valves, 1.60 exhaust valves. Flow about 260/180 CFM.
The valve springs have a max lift of .600, open pressure is 325 lbs, closed pressure is 130 lbs.
Straight Plug. 3/8 studs, 5/16 guideplates. Standard accessory bolt holes.
Want to use either this: Howards Cams CL110245-12... Duration 280/292, Lift .501/.509
or Comp Cams SK12-422-8... Duration 270/276, Lift .495/.502.
Can I use the springs that came with the heads for these retrofit roller cams?
What kind of rocker arms should I buy? The screw in studs have a hex on them.
I plan On putting this in a 73 Corvette 4 speed 3:73 gears.
I'm sure I will have more questions.
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