Forgive me... not trying to ask a really stupid question. I have a 1992 Ford F250 7.3 that I put an ambulance alternator on by accident (2 years ago, I just realized this) which causes my voltage to jump back and forth at higher amps than I am comfortable with. (Stupid question alert) Is it bad to run 100 amps vs the 60? I just purchased the 60 amp to see the difference but it does not have the external stator connection and so I am trying to figure out if I can still use the 60 amp or if it has to have that external plug? Sorry I have no idea what I am doing! I have a new voltage regulator on, and all grounds are good.

So essentially:
Problem - Wrong Alternator?
Solution: Use the 60 amp with no Stator plug?

 

The stator plug isn't used, I also clearly see the stator plug on the 60amp alternator. These trucks came with the large case 100amp alternator. I would not downgrade to a small case 60 amp. Your issue is probably a bad voltage regulator. Also the ambulance package vehicles came with a Leece Neville alternator and that isn't a Leece Neville.

 

When my stock 100A alternator failed, all the local store offered was a 70A and that wasn't enough to keep the batteries nice and hot.

My advice would be to ditch both alternators and do the 3g swap like I and many others have. You'll never be happier

Total cost of all my parts from a junkyard was sub $50

 

Thank you!!! I appreciate the help guys!