1970 Alternator question

[Tom L.]

With reference to the part and date code stamp on an 1100900 alternator for a 1970 454, the NCRS manual states that "On 454 engines equipped with power steering this stamp was on the underside of the alternator."

I found a vendor with a correct and date appropriate alternator, however, the part# and date are stamped near the threaded upper bracket mounting ear, which is on the top of the alternator. The vendor said that all of the stamps for this era car were in that location and that perhaps the NCRS manual is making reference to the clocking of the front half of the case relative to the rear half.

Can anyone shed some light on this? Thank you.

[Terry M.]

Re: 1970 Alternator question

Go ahead and install the alternator and see were the numbers are.

[Tom L.]

Re: 1970 Alternator question

I didn't buy it yet. I want to make sure its the right one first.

[Joe L.]

Re: 1970 Alternator question

Tom-----

I agree with the vendor; all of the alternator stamps that I'm aware of were stamped on the drive end case half in the area adjacent to the threaded mounting boss.

The clocking and/or orientation of the alternator, however, varies by specific application. So, while the threaded boss is usually seen at the top of the alternator for most applications, it's not for all applications. The big block with N-40 for Corvettes is one of those applications. In this application, the threaded boss (and, of course, the adjoining stamping) faces more-or-less "down and outward".