Ya i was going to say, if you want to go to the track 400-450hp will make for a pretty trap speed but without a good suspension and driveline will be wasted money.
with that much power you need at least drag radials, then a clutch or an axle is going to go after a while, even with stock power. Once the rearend is solid and you have a good clutch , time to eliminate that wheel hop, control arms & shocks, you s hould really reinforce the tourque boxes at this point. Weld in a set of subframe connectors. You have about you have spent about 2500 if you do most of the work yourself but at this point you have a good foundation for around 400HP, the good news is you should be in low 13's with all this without touching the motor.
by the way, speed costs money, how fast do you want to go?