If the short block has a harmonic balancer or crank pulley in other words the pulley has a bolt. On my motor it was a 18mm socket i used if i were u try to see what socket matches up to it try 17 18 and 19 mm sockets those are common sizes and are not hard to find. If the short block doesnt have a crank pulley then best bet is put a bolt with spacers on tje crank so u can turn the crank. I suggest doing it with the pulley since rhe pulley has a groove for which the cranks shaft slides right in and locks down a bit more securely
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.