All new motor, transmission, driveshaft, rear end. Plus all the misc stuff on the motor like exhaust system, ECM, new gauge cluster. Practically everything that makes the car move must be replaced. Everything from the intake tube to the rear end.
65 Mustang coupe
306 H/C/I, holley 4 barrel, T5, Hurst Shifter, Subframe connectors, 8.8 w/ 3.55 posi, 4 piston front disc brakes, SN95 rear disc brakes, shelby drop, 620 springs, Mideye 4.5 Leaf Springs, bilstein shocks.