I own a 1970 bronco with a 302 and NP435. I recently bought a rebuilt 302 off an automatic 1984 bronco. I posted before with a similar question but I still don't understand what its going to take to do the install. From what I've read I believe that the the most important thing is going to get the balance of the flywheel correct, I still just don't know exactly what I need to do this. Also, I'm going to install a new centerforce clutch, Since I'm changing engine years do I need a clutch for the 1970 bronco or for the 1984? Please help me get up to speed.