I have decided to go with a Coan Converter and made contact with them and gave them all the specs. He recemmended me a converter but really needs to know the actual HP & Torque of my engine, hence the problem; I could only guess the HP around 700+. This engine is brand new and access to a dyno is slim to none for me; I live in the boonies miles away from any dynos. What is your guys guess?

Stroked 489 BB, eagle crank, H-beam rods, 8.5:1 CR, cast O-port heads with port work; 2.19/1.88 valves, Solid rollar (Harold Cam) 237/243 @ .050, .668/.668 lift. 3.73 gear, TH400 transmission, Vortech Blower 12-15 psi, Motec EFI w 75lb injectors.
what did I miss

thats close enuf he should be able to choose a convertor....
Man that thing is a monster. At first I thought 700 was WAY off. Then I saw the vortech. Now the math is adding up.