I have an AutoMac-II, but haven't hooked it up yet since the OEM altermator
is only 30 amp. I in the process of fitting a 100 amp. alternator.

((You've probably already considered this, but a lot of engines that came with
a 30-amp alternator can't be properly upgraded to a 100-amp. The limiting
factor in those cases is the size of the drive belt as well as the number of
tasks the belt is assigned to do.))