Crank Pulley

[limegreen70]

So I need some clarification. Im going to try and a find Manual steering crank pulley for a 70 Small block. What all years will work for that. 70 + or 69 and back? I have read a few different answers.

 

[Professor Fate]

'70+.
'69 and earlier used a cast iron water pump that was shorter, making the pulley offsets different. They also changed the crank pulley bolt pattern by moving 1 bolt, but that is easily changed by elongating the offending hole with a round file.
There were so many different pulley combinations, that it's just easier to measure the pulley depth you need and go by that.

 

[FL_MarkD]

I have a 3 groove crank pulley for sale and would be happy to send you any measurements you might need. It was on my 1978 360 manual steering , but I replaced all pulleys with CVF Racing aluminum (with their own spacing).

 

[limegreen70]

I have a 3 groove crank pulley for sale and would be happy to send you any measurements you might need. It was on my 1978 360 manual steering , but I replaced all pulleys with CVF Racing aluminum (with their own spacing).

Thanks for the offer but I was talking about just a single groove. Those other groves I imagine would be AC or other accessories.

 

[4spdragtop]

Like Professor Fate said, the only difference from 69 to 70 is the bolt pattern is slightly different. A few minutes with a file and yer good.

 

[cudamark]

Like Professor Fate said, the only difference from 69 to 70 is the bolt pattern is slightly different. A few minutes with a file and yer good.

Nope, the offset is different too. He needs a '70 and newer pulley for manual steering and no A/C to get the correct offset. For the bolt pattern, '70-1 are correct for the '70 balancer, but, the '72-up ones will work with the previously mentioned file mod needed to elongate the one hole.

 

[4spdragtop]

I thought his question was the difference from 70 non ac to 69 non ac? I didn't realize there was, in addition to the offset hole.

Nope, the offset is different too. He needs a '70 and newer pulley for manual steering and no A/C to get the correct offset. For the bolt pattern, '70-1 are correct for the '70 balancer, but, the '72-up ones will work with the previously mentioned file mod needed to elongate the one hole.

 

[cudamark]

'69 and earlier use the cast iron water pump. '70 and newer use the aluminum one. All the brackets and pulleys are different between the two systems.

 

[oldkimmer]

P/M sent. Kim