Can someone recommend a quality replacement alternator for my 1970 442? Y72 (HD cooling), (G91) 3.32 gears and C60 (AC). Originally came with 1100890 55A. Found a date coded reman for $1500. Really? I don't think originality is that important!

 

Do you have the original? I’m guessing no but if you do, get it rebuilt/restored.

Decisions are easier when you drive a mutt!

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I do not have the original or I definitly would have that restored. It currently has a no name aftermarket alternator that took a dump.

 

I discovered that a local armature shop would rebuild my alternator, replacing just that parts that were needed, and it was cheaper than buying a rebuilt unit from the auto parts store. If the alternator required a complete rebuild, they did it for the same price as the parts store remanufactured unit, so it was a no-brainer to bring it to them.

 

If an actual OEM replacement not a requirement for you, Bosch and Powermaster both make all brand-new direct-fit internally regulated replacements - Bosch is 62 amp and Powermaster = 100amp. I have the Powermaster and it's been rock solid since install about 2 years back.

Either alternator will allow you to eliminate the firewall mounted voltage regulator by performing a simple engine harness wiring bypass for the connector that plugs into it.

 

Any suggestions if I decide to keep the external regulator? Does AC Delco make a new alternator with an external regulator?

 

1100890 is an internal regulator.