500rwhp will power a foxbody into the 10’s with ease and more than enough on the street. In a heavier car it may not be a lot of power but that’s why dynos don’t win races. There are WAY more factors that come into play. I have been going to the track for along time and I have seen 400rwhp cars spank 500+rwhp cars. That is why most guys serious about racing and getting good track times don’t spend there time on a dyno. Hell, most of the fast cars at the track have never even hit a dyno, here is a guy I knows old 07 GT500…
How much power does it make??? No clue, he races at the TRACK. Ran 9.87@140 with a stock engine and stock 6spd transmission. Rearend is a beefed up 8.8
Race weight around 3850lbs…
