How much horsepower should I expect?

The camquest software worked well for me. I think the key is entering the head flow numbers correctly (not guessing). I entered what I got from Ryan J after he ported my heads + all the other engine specs…for the single plane intakes, use Std Single plane (the others are VERY optimistic). My cam was on file too, the XE286R, 248/254 duration with .576/.582 lift.

Mine said ~530hp (IIRC), which sounds about right if you look at my cars weight, ET and MPH in the ¼.