I've never been able to make stock config pulleys work with an ATI.
As far as I know none of the ATI dampers line up properly and all require
shims and/or machine work to line the pulleys up.

That might be my own fault for not trying enough different stock pulleys, but if you
don't have 'em, you can't try 'em.

You might be able to make stock config pulleys work with a good selection of shims and a bunch of patience.

I usually end up taking the potpourri approach and just making a combination that I like, work...
Something that seems to make sense at the time. This one required 1/8 cut off the crank pulley.

make certain the hub is bottomed out on the timing gear and no more than around .001 press fit/often requires honing.
It's also okay to machine the hub shorter, but watch out for clearance to the timing cover (that's why I don't attempt it, but it's possible).

On my wedge I used a stock wedge WP pulley with a moroso crank pulley + shims.
This hemi has moroso crank pulley + AR spacer for the motor plate + .125 machined off the moroso pulley
with a march WP pulley.


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Last edited by ZIPPY; 09/21/21 03:48 PM.