This one should be a bolt-on swap for the older system. It can be set up for either positive or negative ground, and it has a built in regulator to replace the older remote regulator and selenuim stack rectifier item you have now.

www.ebay.com/itm/404871426034?i

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!