sorry to hijack the the thread but I have a somewhat related question.

I've got my new engine and trans in ready to run but am still waiting on the rear end. Would I be able to run this with out the rear end installed? I do have a driveshaft that I could use to plug the output shaft of the transmission but just want to make sure it would be ok to run in neutral as the other end of the driveshaft wouldn't be connected to anything.