Adding A/C to big block--pulley help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jumpsoffrock · 05-09-2021, 01:03 AM

I do not need help with compressor brackets so let us leave that alone.

I've spend 3 hours with 27 different tabs open and am more confused than ever.
Can someone please just tell me what pulley(s) I need different than I what I currently have on the engine right now?

Are they rare and expensive?
Do I need a different water pump?

Thank you

lil hoodlum · 05-09-2021, 01:16 AM

Hello, not sure how much I can help, but please give us more information. What year truck? What size motor? Any other belt driven accessories?

71meangreenc10 · 05-09-2021, 01:30 AM

I have a set on the ground that has the added pulleys for AC on the crank. I can go look tomorrow and get you a pic and see if there are any part numbers on the parts.

Water pump is there also, I'll check for a number.

Smitty

jumpsoffrock · 05-09-2021, 01:31 AM

Sorry bout that must have had a brain fart.

1972 3500, 402, only water pump and alternator. No other belt driven items.
Smitty, that'd be greatly appreciated if not too much trouble.

71meangreenc10 · 05-09-2021, 01:35 AM

Quote:

Originally Posted by jumpsoffrock

Sorry bout that must have had a brain fart.

1972 3500, 402, only water pump and alternator. No other belt driven items.
Smitty, that'd be greatly appreciated if not too much trouble.

Not a problem. I have a 396 from a 69 on the ground with all the pulleys. Should be able to get you that info in the morning.

Smitty

**kwmech** · 05-09-2021, 12:16 PM

Did this on my 69 flatbed

**kwmech** · 05-09-2021, 12:18 PM

Have a triple crank pulley and a double water pump pulley---all OE factory short water pump stuff

jumpsoffrock · 05-09-2021, 12:26 PM

I've never seen someone use a tensioner or back-side pulley like that on an old school V belt before. so that makes be feel better because I was thinking of trying that route.

71meangreenc10 · 05-09-2021, 12:51 PM

So the wp pulley number for mine is:
3927796 AE Double Groove Pulley

Crank:
3874418BS GM Double Groove Pulley

Add on pulley has the following numbers:
C4051 and C4052-S ACME It adds Two more grooves to the crank

If you PM a phone number I can text you pics. Don't have the time to resize them at the moment.

Smitty

05-09-2021, 01:03 AM	#1
jumpsoffrock Registered User Join Date: Apr 2014 Location: California Posts: 924	Adding A/C to big block--pulley help I do not need help with compressor brackets so let us leave that alone. I've spend 3 hours with 27 different tabs open and am more confused than ever. Can someone please just tell me what pulley(s) I need different than I what I currently have on the engine right now? Are they rare and expensive? Do I need a different water pump? Thank you Attached Images

05-09-2021, 01:16 AM	#2
lil hoodlum Registered User Join Date: Oct 2009 Location: Denton, Texas Posts: 1,695	Re: Adding A/C to big block--pulley help Hello, not sure how much I can help, but please give us more information. What year truck? What size motor? Any other belt driven accessories?

05-09-2021, 01:30 AM	#3
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,158	Re: Adding A/C to big block--pulley help I have a set on the ground that has the added pulleys for AC on the crank. I can go look tomorrow and get you a pic and see if there are any part numbers on the parts. Water pump is there also, I'll check for a number. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time

05-09-2021, 01:31 AM	#4
jumpsoffrock Registered User Join Date: Apr 2014 Location: California Posts: 924	Re: Adding A/C to big block--pulley help Sorry bout that must have had a brain fart. 1972 3500, 402, only water pump and alternator. No other belt driven items. Smitty, that'd be greatly appreciated if not too much trouble.

05-09-2021, 12:16 PM	#6
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,395	Re: Adding A/C to big block--pulley help Did this on my 69 flatbed Attached Images

05-09-2021, 12:18 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,395	Re: Adding A/C to big block--pulley help Have a triple crank pulley and a double water pump pulley---all OE factory short water pump stuff

05-09-2021, 12:26 PM	#8
jumpsoffrock Registered User Join Date: Apr 2014 Location: California Posts: 924	Re: Adding A/C to big block--pulley help I've never seen someone use a tensioner or back-side pulley like that on an old school V belt before. so that makes be feel better because I was thinking of trying that route.

05-09-2021, 12:51 PM	#9
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,158	Re: Adding A/C to big block--pulley help So the wp pulley number for mine is: 3927796 AE Double Groove Pulley Crank: 3874418BS GM Double Groove Pulley Add on pulley has the following numbers: C4051 and C4052-S ACME It adds Two more grooves to the crank If you PM a phone number I can text you pics. Don't have the time to resize them at the moment. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.