1954 Mark V headstock upgrade

[sbarr066]

I have a 54 mark V (sn 283945) that I have been working on restoring for the last couple weeks but I haven't started on the head stock. What I'd like to do is buy the power pro upgrade for a newer 520 I have then put the 1 1/8 motor and belt onto the old greenie. My question is, if I decide to do this, will I have to buy any extra parts or should I be able to just use what is left over from the 520 after the upgrade to fix up the greenie? I didn't think I'd be the only one trying to do this but I could not find a thread specifically on it.