crank pulley clearance problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

prostreet1967 · 11-20-2006, 08:56 AM

carnk pulley won't go on its hitting the front crossmember bbc using front mounting holes anyone run in to this problem if so whats the fix underdrive pulleys and where can u get some for lwp setup?

prostreet1967 · 11-20-2006, 08:59 AM

are the frames different for 67 compared to 68-72 since 67 wasn't avaliable with a big block?

prostreet1967 · 11-20-2006, 09:26 AM

its hitting here

**1970 CST Short Wide** · 11-20-2006, 11:00 AM

What mounts do you have? Are they for sure BB? I think SB sets the engine down further. Someone correct me if I'm wrong

Bob Moore · 11-20-2006, 09:38 PM

It may just be the photo but the crossmember looks distorted or bent. It should be flat going across the rails. Those get bent very easily. That would cause the crank pully to hit.

I'm not saying it is bent but the photo makes it look that way.

**LockDoc** · 11-21-2006, 01:00 AM

.
Bob: That crossmember looks that way from that angle. I think his is OK. (I had to go out and check my frame to make sure)...

prostreet1967: I tend to agree with 1970 CST Short Wide, my 454 is about an inch above that x-member at the front of the pulley with '72 BB motor mount towers.

LockDoc

novajess1972 · 11-21-2006, 10:18 AM

Quote:

Originally Posted by 1970 CST Short Wide

What mounts do you have? Are they for sure BB? I think SB sets the engine down further. Someone correct me if I'm wrong

I would agree. I just put the BB brackets/stands on in place of the SB brackets, and it does appear that the center mounting hole is higher. I have a 72.

Jesse

prostreet1967 · 11-21-2006, 10:53 AM

Quote:

Originally Posted by novajess1972

I would agree. I just put the BB brackets/stands on in place of the SB brackets, and it does appear that the center mounting hole is higher. I have a 72.

Jesse

so did you get the bottom pulley on without it hitting th crossmember

CC Rider · 03-28-2015, 11:53 AM

I have the same issue on my 67 c10 with bbc swap. Previous owner torched clearance. Looking to replace with stock cross member to improve appearance.

Longhorn Man · 11-21-2006, 06:27 AM

I've seen a few back yard swps that had that area cut. Never looked into the reason though.
67 frames are a little different than later ones, but I', thinking it was width.
a short water pump might help, thats what was stock
motor mounts and the stands may be to blame.

11-20-2006, 08:56 AM	#1
prostreet1967 Registered User Join Date: Oct 2006 Location: fort worth texas Posts: 395	crank pulley clearance problems carnk pulley won't go on its hitting the front crossmember bbc using front mounting holes anyone run in to this problem if so whats the fix underdrive pulleys and where can u get some for lwp setup?

11-20-2006, 08:59 AM	#2
prostreet1967 Registered User Join Date: Oct 2006 Location: fort worth texas Posts: 395	Re: crank pulley clearance problems are the frames different for 67 compared to 68-72 since 67 wasn't avaliable with a big block?

11-20-2006, 09:26 AM	#3
prostreet1967 Registered User Join Date: Oct 2006 Location: fort worth texas Posts: 395	Re: crank pulley clearance problems its hitting here Attached Images

11-20-2006, 11:00 AM	#4
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,106	Re: crank pulley clearance problems What mounts do you have? Are they for sure BB? I think SB sets the engine down further. Someone correct me if I'm wrong __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

11-20-2006, 09:38 PM	#5
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: crank pulley clearance problems It may just be the photo but the crossmember looks distorted or bent. It should be flat going across the rails. Those get bent very easily. That would cause the crank pully to hit. I'm not saying it is bent but the photo makes it look that way. __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

11-21-2006, 01:00 AM	#6
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,402	Re: crank pulley clearance problems . Bob: That crossmember looks that way from that angle. I think his is OK. (I had to go out and check my frame to make sure)... prostreet1967: I tend to agree with 1970 CST Short Wide, my 454 is about an inch above that x-member at the front of the pulley with '72 BB motor mount towers. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

03-28-2015, 11:53 AM	#9
CC Rider Registered User Join Date: Jul 2013 Location: Hutchinson MN Posts: 4	Re: crank pulley clearance problems I have the same issue on my 67 c10 with bbc swap. Previous owner torched clearance. Looking to replace with stock cross member to improve appearance. Attached Images

11-21-2006, 06:27 AM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: crank pulley clearance problems I've seen a few back yard swps that had that area cut. Never looked into the reason though. 67 frames are a little different than later ones, but I', thinking it was width. a short water pump might help, thats what was stock motor mounts and the stands may be to blame.



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