Re: 355 sbc how much horsepower ?
I norder to optimize the runner volume of those heads, and the fact that they want to make power waaaay up in the rpm range, you'd need a much bigger cam. The problem is that such a combo would be a dog down low from idle to say 3,000 rpm. If running an automatic, you'd need a converter stall-rated at 3,000 or more, and would need really low gearing.
I'm not saying that it will be a slug or that it won't go, just that optimally, you should have bolted on a set of 180 heads instead of the 210s.
Your CR is a little on the high side for such a small cam too, even with aluminum heads.
1972 Malibu Sport Coupe - Victory Red on Black - 350/TH350
I do all my own stunts.