[roundportponchos]

Here is nos I have, , its, a 63 amp, ac, as rear defog, or w72,
1102485, the one on stick, non ac, a 42 amp,
1102486, another used 61 amp, ac or rear defrost

I guess, any of these 3 #s were used, depending on options

[dreamn69]

Mine is 1102908 63A
78KO512

Could that be correct?

[roundportponchos]

I would say, wrong, those 3 numbers, I listed, are it, according to books I've read.
You may have a 78, could be another gm model

[Held for Ransom]

Originally Posted by dreamn69

Mine is 1102908 63A
78KO512

Could that be correct?

78K05 is the date code Oct. 5th, 1978. 1102908 is a Corvette alternator.

[Maxthe222]

Originally Posted by Held for Ransom

78K05 is the date code Oct. 5th, 1978. 1102908 is a Corvette alternator.

Sorry to dig this up, but it was the only post that came up. I have that exact same alternator number that came off a 1979 W72 engine. Same number 1102908 and similar date range. I checked a friend with a W72 TATA as well, it has the same number. Did the last 400's just start getting standardized alternators or something?

[wheels]

Originally Posted by Maxthe222

Sorry to dig this up, but it was the only post that came up. I have that exact same alternator number that came off a 1979 W72 engine. Same number 1102908 and similar date range. I checked a friend with a W72 TATA as well, it has the same number. Did the last 400's just start getting standardized alternators or something?

Are these alternators original or replacements?

[Held for Ransom]

Originally Posted by Maxthe222

Sorry to dig this up, but it was the only post that came up. I have that exact same alternator number that came off a 1979 W72 engine. Same number 1102908 and similar date range. I checked a friend with a W72 TATA as well, it has the same number. Did the last 400's just start getting standardized alternators or something?

Thank you for pointing out there may be an error in what I've reported. I found the MVMA's for the 1979 Corvette and Firebird's and don't know what document I used to report what I did 7-8 years ago. I hope this helps...

[Maxthe222]

Originally Posted by Held for Ransom

Thank you for pointing out there may be an error in what I've reported. I found the MVMA's for the 1979 Corvette and Firebird's and don't know what document I used to report what I did 7-8 years ago. I hope this helps...

Cool, it sure does. The alternator for the corvette certainly does NOT appear to be 1102908 based on your documentation, and low and behold, under the information for the Pontiac line, under equipped with A/C, the alternator number is 1102908. So, this does appear to be the correct alternator for a 1979 400 W72 engine.

[highway star]

My 1978 oem alt. has date code 7M19, so what is that date? Didn't they leave out the i when counting months??