1965 chevy C10 pulley HELP for stock AC

[Blk63vette]

Hello
I’m trying to get my truck in driving condition and restore the factory AC system. I’m having a heck of a time trying to find the correct pulleys for his truck factory AC truck. (This truck didn’t come with the correct pulleys) Does anyone have the pulleys or the correct GM # so I. An find these parts
Thanks
Pete

[LT1 Burb]

I went through 20 pulleys before I found the correct ones.

[Blk63vette]

Hello
Thanks for response after a lot of research I think I have the GM part# for crank and water pulley.

I think these are correct but I’m not 100% sure. There is not a lot of info out there for stock pulleys for factory ac 1965 truck.
Single Groove pulley crank GM part# 3755820 I think it will work
Crank pulley GM part# 3831397
Water pump GM part# 3868451

Does anyone have a crank or water pump pulley for sale?

Thanks
Pete

[Blk63vette]

I also acquired a power steering pimp a while back from a Camaro. I’m hoping it will work.

[60-66]

For the crank shaft you need the single groove pulley # 3755820 and a two groove cast pulley 3876326 . Water pump is a 3 groove cast pulley # 3868451 and power steering pump pulley part number 3791943 . For the cast pulleys, these are truck only and are for Alternator Power Steering and AC using all three grooves on the crank pulley. The PS pulley is a special offset to work with the extended crank cast pulley. That pump should work. Brackets look right but that adjuster bracket is a later design .

[60-66]

Heres the pulley , their description is incomplete. That pulley was used from 1963-1966 on our trucks with AC https://www.ebay.com/itm/1966-1972-C...IAAOSwNqxcPNHH

[Blk63vette]

Hello
I can’t thank you enough 60-66. I could not find anything on this set up and of course I am starting out with only single groove pulley 3755820 which I had for a while. I’m glad at least one pulley. I don’t have to buy. I am going to buy cast iron crankshaft pulley. 3876326. If anyone Knows where I can get water pump pulley 3868451 let me know. I noticed that power steering pulley is very $$$.

[Blk63vette]

Hello 60-66

I also have a fan spacer 3765386. I do believe this is the correct one. Do you know what is the correct fan for factory set up?

Thanks again
Pete

[LT1 Burb]

Originally Posted by Blk63vette

Hello 60-66

I also have a fan spacer 3765386. I do believe this is the correct one. Do you know what is the correct fan for factory set up?

Thanks again
Pete

The fan in my picture is the right fan, also had a 4 core radiator and a shroud.

[60-66]

Originally Posted by Blk63vette

Hello
I noticed that power steering pulley is very $$$.

Im sure you could find one cheaper on here in the for sale section

[60-66]

Originally Posted by Blk63vette

Hello 60-66

I also have a fan spacer 3765386. I do believe this is the correct one. Do you know what is the correct fan for factory set up?

Thanks again
Pete

Like LT1 said , its a fixed 5 blade fan . But , theres several different styles of those also. Theres a round head rivet and a flat head rivet. You want the flat head rivet. Round head is pre 1964. Heres an original .

[60-66]

The spacer is the early part number 3765386 was changed to 3857041 and is correct for AC trucks