Not hard at all.
Get a delco "1 wire" alternator (several in junkyards).
Use the appropriate bracket kit or fabricate your own (really not that big a deal).
Run a heavy lead to the starter solenoid + terminal.
Remove the old harness and regulator.
If you don't like having to rev it to engage the self exciting and want an indicator, jump a wire from your "f" terminal to the indicator light wire to your dash (both indicates and "excites" the alternator at minimum revs).
Really simple.

Mike!