For hydraulic I had good luck with a Lunati 290 duration cam. Based on the 327/350 hp L79 Cam which I love but a little hotter. Are you going auto or stick. If auto are you going to run an auto how about the torque converter? Parts need to work together, Heads are great, which pistons and CC did you go with, I like a 650DP Holley personally with an Airgap intake but you can make due with a 600cfm. SBC's must breath so don't restrict the intake or the exhaust. I am forced to stay with cast iron intake and exhaust and it kills me not to run the 650DP, nice intake with 1 5/8 ceramic headers and a mandrel bent 2.5 exhaust. Stay with a flow through muffler to avoid the dreadful drone. And a H pipe is nice too to help low end a bit. 3400-3600 pound cars with a 350 like 3.42 or 3.55 if highway rpm's is not a concern, I have a 3.31 with a low 2.20 first gear M21 with my L79 and its a bit sluggish until 15 MPH.. and ignition, well tuned HO distributor, no points
Here are my more updated specs:
Summit Racing® Headers SUM-G9001-SS Full-length Primary Tube Outside Diameter (in):1 5/8 in.
• I have a good 4 bolt main block
• 350 CHEVY CYLINDER HEADS #041 casting NEW GUIDES .500 SPRINGS
new stainless 2.02 swirl polished intake valves
new stainless 1.60 swirl polished exhaust valves
• Heads are assembled with new .500 Z-28 lift valve springs
New cam: COMP Cams 12-238-2 Xtreme Energy 218/224 Hydraulic Flat Cam -218/224 Duration at .050". 110 Degree Lobe Separation Angle 462"/.469" Valve Lift 1,300-5,600 RPM Operating Range
• Rebuild/overhaul master kit with moly rings
• Edelbrock Single-Quad Performer Manifold and Carburetor Kit for Small Block Chevy 1955-1986 - Performer EPS Intake Manifold, 600cfm Performer Series Carburetor
The rear end kit I got was 3.42 posi. If you think that the 600CFM is going to hold me back, I can always sell mine and upgrade - I didn't want to over carb the engine. What size would you all recommend?
I have stock bottom end right now
Auto transmission TH350 - What converter would you all recommend?