Unidentified GM Pulleys

[68SSCamaro]

I have three GM pulleys that I have not been able to find the application for. Maybe someone can help me out.

1. 346290 AB, this is a crank extension pulley for power steering. It is a little further out from the engine than the 232 SB version.
2. 3923752 AE, this is a smog pulley, 3 mounting holes, deep groove with an offset away from the engine.
3. 3906329 BW, this is a cast iron alternator pulley.

Any help appreciated.

Thanks, Martin

[Mr70]

Martin
From what I have here,Hope this Helps.

*Crank Pulley #346290 was revised to #14023153 & is currently available from Chevrolet today.1975-1982 Corvette.

*Smog Pulley #3923752 was revised to #330552.It is currently pulled from the records,and is either in the process of being deleted,or being reassigned a new part number.1973-74 Corvette.

*Alt. Pulley #3906329 was revised to #3906330.For 1962-1969 Chevrolet vehicles,I think this is for a Truck application?

[Mr70]

I Found my 1938-1969 Truck Parts book after I posted earlier.

*Smog Pulley #3923752 AE is indeed a 1968-69 Series 10 & 20 Truck application with 292 engine.I don't know why Chevy is showing the revised number for 73-74 Corvette.

*Alt. Pulley #3906329 BU is indeed a 1962-1969 Series 10-20-30 Truck with 292 engine.

[68SSCamaro]

Thanks Rick,

What does the truck book say about a 3942992 water pump pulley? I think it's also 292 truck. Looks like I have a set of undesirable pulleys.

Martin

[Mr70]

Water Pump Pulley #3942992 is a 1969 Series 10-20-30 truck w/292 engine w/o A/C or heavy duty cooling.

[lowmile]

Since you have your pulley book out. Would a 3955291 be correct for a 70 375 hp Nova. I believe it is correct for a 69 Camaro. I just don't know if it is the same for a Nova. Mark

[Mr70]

Yes Crank Pulley #3955291AB is a double groove,deep groove,& for all cars with Solid lifter BB Special Hi-Perf engines.Regardless if has Power steering or not.
1970 L78 Nova is one of these.

[1969camarors427]

rick, here is another one for you, it is a 2 groove crank pulley deep groove. the number on it is gm 469558 BC usually there is a number in front like a 3 or so but not on this one, i am pretty sure it is big block pre 69. thanks,george

[Mr70]

George
I show Part #469558-BC to be a 2 groove Crankshaft pulley for a 1977-79 Corvette all 350 SB applications w/P/S.
It is a 7&3/4 diameter pulley,and was superseded by new part #14023151 around 1982.That superseded number is currently available from Chevrolet for $42.00.
Rick