Pulley alignment problems

[Southedisto]

While converting to PS, I realized that neither pulley I have will work. So which crank pulley do I need. If someone has a pic, or the pulley I need, please post up. Here are the pics of my problem, shallow and deep pulley.

Also, would the brackets make any difference? I have two sets of those also, both of them different. One is cast, and one is stamped, all help is greatly appreciated.

[69TowRig]

Just went through this, and Joey67 did too. You have a short water pump. That 2nd pulley is a short water pump PS pulley. You will need either a 3 or 4 groove crank pulley for short water pump to make that work. The short pump crank pulleys fit flush to the harmonic balancer. This is using the cast brackets.

After playing around in the WTB section for over a week I called summit and ordered their 3-groove chrome crank pulley P/N SUM-G3972. It should arrive mid-week and I will report back if it fits or not, but I am pretty confident that it will work great.

[rage'nrat638]

heres a picture
mines a double cast crank pulley and a double rear pulley

[Sport/Truck]

I’ll make note of the crank pulley as I don’t think my pulley issues are solved yet.
Thanks for the PN#.
s/t

[Southedisto]

Would a later model work?

[ratrod67]

Originally Posted by Southedisto

Would a later model work?

Up to 72 will work unless you can find one from a corvette or 1 ton truck. 73 and up used the long water pump set-up. Mine is a double crank pulley with a single add on for the power steering.

[Southedisto]

Originally Posted by ratrod67

Up to 72 will work unless you can find one from a corvette or 1 ton truck. Mine is a double crank pulley with a single add on for the power steering.

I have read that a dozen times since last night, guess I'm getting desperate . Thanks for the reality slap

[red71cheyenne]

I had the same issues installing power on the Blazer, and just bought 3/8 inch spacers from the hardware store to move the pulley out far enough to reach. Had to also get the proper pulley used from a board member as I didn't have the right one. Looks like the deep one in your pic.

[Sport/Truck]

You guys should contact this guy SouthernParts he has pulleys for $10 & are for the short water pump. I ordered a water pump pulley and got it the other day. Now I’m waiting to see how everything looks after I get the truck back together. I may need a crank pulley before it’s over.
s/t

[TraderJon]

i know how you feel,I just went thru the same when doing the bbc swap,between my two buckets of pulleys & my buddies two buckets,i managed to scrape up a set off of a 81 3/4 ton truck,,,I had to buy a new p.s. pump from O'rielly's & i think Ragenrat gave me the part #'s for the p.s. brackets,thanks Mark !,,,Good luck..
Jon

[69TowRig]

Originally Posted by 69TowRig

After playing around in the WTB section for over a week I called summit and ordered their 3-groove chrome crank pulley P/N SUM-G3972. It should arrive mid-week and I will report back if it fits or not, but I am pretty confident that it will work great.

Well as it turned out, that particular pulley is the wrong diameter for my application (I should have drove the hour round trip to measure the pulley where the truck is stored). The original was a 6 3/4" and that Summit pulley is a 7 1/4", so it contacts the water pump pulley and won't work. Ugh now I have to send it back to Summit and cough up even more money for the smaller diameter one.