Can I take this Mustang?

[Silver5.0]

I've got a 91 Gt with a tci aod manuel valvebody with a converter, trans cooler, mac headers, off road h-pipe, flowmasters cat-back, 9mm wires,fpr,190lph fuel pump, full saleen suspension, aluminum driveshaft, 3:55 gears, edelbrock intake polished upper and lower , 3/8 spacer, underdrive pulleys, removed a/c, bumped timing. Now he's got The same year GT he's got mufflers, dual friction clutch and he just rebuilt he's engine to a 306 with just GT-40 iron heads stock everthing else. The thing is he's got a 5-speed but a high mileage abused rest of a car. Thanks