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Those delco 6 volt starters.. What's the differance from Chevy or GMC,,, Is it CW or CCW,,, or does just hooking it up postive ground or neg ground make it turn differnt directions.

I don't know the difference between chevy, GMC etc. but I do know positive or negative ground has no effect on which way the starter turns.

Like stated above, the pos. neg. ground makes no difference on the starter rotation. Looks like the Chevy and GMC truck starters from the 40s up until the 1st production 55s were pretty much the same. I know from experience that the shift lever that throws the drive in was different on the GMC and because of this it made the drive end housing different.....they were interchangeable but different....have yet to figure that one out. After 55 GMC went to more "odd ball" starters with different housings, starter drives etc. Using Buick motors in the GMCs made them that much more different...along with motors such as a 270, 302, 316 etc..Most all of them called for different housings, drives etc.
Ken

I'd like to see the source for Kennethw's information.

I have the factory Delco Remy starter and generator catalogs from 1930s and up.
Ken

You mentioned Buick motors. These manuals tell you GMC used Buick engines after 1955? Or did you mean Buick starter motors?

GMC V8s of the late '50s were based on Pontiac engines.

Didn't one of the Chevy big rigs use a nailhead Buick V-8?
Jerry

the TF series used a 322 they called the 'Loadmaster'

Bill

Thank you Cletis, exactly what I meant to say. Some of the starter motors used in some of the GMC trucks shared the same starters as some of the Buicks and other GM cars. They would all have had different Delco numbers of course but aftermarket numbers grouped them together, this way you could easily figure out that one specific starter may have fit other motors regardless of the specific Delco number. Kind of a cheat sheet for the original Delco numbers.
Yes on the Buick engine for 56 CHEVY. 1956 Truck, Series 9000 and 10000 had optional 322 Buick engine. There was even an optional power steering generator specific for this truck and motor that was different from the basic power steering generator used on the standard cars and smaller trucks.

Thanks for the clarification.