Update to this issue. After going to the back of the line, I was recently told that FE's do NOT hit 500hp by the builder.
That's all I needed to read to know that this guy is clueless, and now he's making excuses for his inabilities. Simply ordering a bigger cam is NOT the fix. I'd suggest you look in the Dyno forum area and you'll find anything from 400 to 800 horsepower FE's, none of them boosted. Lots of 445 builds in there also, most all of them above what you're looking for. 500 hp from a 445 is only 1.12 hp per cube, and that should be a pretty easy target.
The fact that he has one cam for all his stroker builds also leads me to believe that this builder is just a guy that throws parts together and hopes for the best.
This post from Brent is right on...
Cam was not the problem.....
If the .200" numbers were not as ground, then why did he add 8 degrees more lift at .050" and another .100" of lift?
?
Something just ain't right here.
If you take it to another shop to have it dynoed, then you've just absolved the builder of all liability if, or more likely when, something goes wrong. This whole situation gives me a gut wrenching feeling that it isn't going to end good.