Then who really cares about running a 10 second quarter? I would just build the engine at the limit of the TKO and you will be more than pleased. Especially with the 5 speeds low first gear and closer gears.
If your running BFG TA's you won't even hook up with 300 hp.
I think you would be much happier with updating the suspension, steering and brakes so that it drives like a new car. I wold recommend a hydroboost.
A decent amount of power in a sloppy car isn't any fun.