Opinions on 496 Chevy build.  Mark IV 2 bolt converted into 4 bolt, 10;1 bottom end complete forged crank and pistons. 

Question is opinion on head selection and cam selection.  Thinking AFR Heads around 305cc Roller cam off shelf non custom grind but dont want wrong power curve dont want too big and have no bottom end power.  So question is cam selection choice hopefully from experience. 

Berk 12jg will be rebuilt and matched.

I know alot of veriables but wheres a good place to start. Mid 80's Bahner open bow full stringer

I would talk with chris straub, he really knows his stuff.

http://www.straubtechnologies.com/custom-cams/

X2 on that you really don't want to over cam it @10:1 comp and don't over do it when it comes to heads. Bigger isn't always better. Good luck with the build.


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My favorite big block cam of all times is the XM series roller XM270HR

Hydraulic roller with modest lift, use stock ratio rockers and good springs and it will be bulletproof, if you find you need more, increase the rocker ratio one step.

It will run like a pit bull toward the postman... The best part is, with stock rocker ratios, the valve lift is almost dead on .5", you can rest assured it will not need too much tweaking to get the geometry right. You will need an open plenum intake and a square bore double pumper in the realm of 1,000 cfm to make it work.

I have run this in a light aluminum boat (under 350 pound hull) with a crate 454 and it literally pulled to 5300 RPM with a stainless A without any drama at all. We were running 1.72:1 stamped rockers with the kit springs. (The stamped rockers were a rule thing).

Really can't go wrong.

You could probably push it a little, but unless you bump the compression, doubt the ass-o-nometer will detect a difference.

GT


 http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=448&sb=2

I'm looking at XM284hr comp cam