buildin a 4.6

[venom281]

IT TURNS OUT THAT IM GOING TO BE HAVE A RACE SHOP IN PALM DESERT,CA DO MY MOTOR WHEN ITS DONE IT SHOULD BE MAKING 450 TO 500HP AND BE ABLE TO ACCEPT A 200 SHOT OF NOZ THAT IM GOING TO PUT ON IT ASWELL, IM NOT SURE ON THE DETAILS OF THE PROJECT YET BUT I WILL KNOW THIS WEEK AFTER THEY TAKE IT APART, I DO HAVE ANOTHER ? THOUGH, I HAVE A V6 IN THERE RIGHT NOW FOR THE TRANNY SHOULD I KEEP THE V6 TRANNY AND BEEF IT UP OR SHOULD I PUT A V8 IN THERE? ALSO HOW HARD WOULD IT BE TO PUT SWAP A AUTO TO A 5 SPEED?