625hp sounds a little high for that intake/tb, but I don't think it's too far off. Here's my friends combo making 657RWHP.
347 8.5:1 compression
AFR 185 heads.
Ported lower SysteMaxII lower w/ Vortech/Saleen upper
1.6 scorpion rockers
S-trim (2.75 upper, 6.87 lower) 14#
1 3/4 BBK longtubes, 2.5" Dr.Gas X pipe, and 3 chamber delta flow flowmasters
SMC 'Superpump' methanol injection (straight methanol, no water mix)
PMS tuned.
Who built your friends bottom end? I'm looking to get around that number but my block is a hinderance to me.