My new Isky solid flat tappit cam (video)

They are Hedman Hustlers.I think they are 1 7/8 primaries and 3 1/2 collectors ,but i havent measured them.I am running 10 inch extensions on them that i made when i raced it with the other cam.Not sure if im better off with or without them now.This is a 10.2 to 1 motor BTW ( the heads were milled about .010 and im running .028 compressed head gaskets).It has a real decent short block with an Ohio Crank 4 inch crank ,Eagle rods ,and KB quench dome hyper pistons with a .035 quench (I clayed them myself).It also has ARP rod and main cap bolts ,as well as head studs.I run it on 110 Sunoco so i dont have to worry about detonation with the timing this cam likes .Im guessing i have a shade over 500 hp now with about that much torque.Sound about right on a hp estimate ???