I have been wanting to upgrade my alternator to a Denso type for several years and even have an AR Engineering bracket kit sitting in my garage. But the AR kit specifies it for a 1985-1991 Denso alternator with an internal regulator. I don't want to get into my wiring to remove the regulator, which would also leave holes in my engine compartment. Doe anyone know of a Denso alternator that uses the same alternator case but is set up for an external alternator? Or can I just leave my regulator in place and "bypassed" somehow?

do it and ditch the regulator - I just took off the electrical tape and pulled the wires - you will also need to run new wires - need to run a decent wire for the alternator and a sensing wire as well - with the regulartor gone one less thing to fail

M bodies and trucks upto 1989 or so used the ones with external voltage regulator.

One of the best features of running the Denso is ridding yourself of the unreliable external regulator
Gus

Thanks for the advice guys. I guess I'll ditch the voltage regulator. I don't like working on wiring but I guess it can't be that bad.