Transaxle
Your choice of a Renault UN1 with a 3.44 or a UN5 with a 3.89 both stock diff. Aluminum zero balanced flywheel and new 450hp 10.5" clutch and pressure plate. 93 Ford Mustang starter. New clutch master cylinder and slave cylinder.
The 3.89 will give you blistering acceleration in all gears and top out at 140 mph, best for most tracks. The 3.44 is more road friendly and better for less experienced track drivers.
You pick one, the 3.44 is in the car now.