Whew

How fast do you want to go.

Is the car an AOD.

If so you need to swap it over to a 5 speed (can't make chicken salad out of chicken shit) lol

If it is an auto in good shape add a stall and a valve body that will hold the 2/3 shift.

You can get the heads/intake off a v8 explorer, roller rockers, electric fan, gears.

The aftermarket is HUGE for these cars. I would suggest a visit to corral.net

If you need some parts let me know I have a ton of stuff.