Dear Ryan;

I have found 261s with the 'milk can' type, but they may have put there by a Rebuilder & not GM.

They will work but the pushrods are a different lenght.

Better to use the low solids & not hydraulic.

Good luck, John M., #3370....

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon