dre

Can anyone tell me the benefits or disadvantages of having thin walls where the pushrods are supposed to go through? I'm looking at a set of C heads that I may purchase off of craigslist but they have been opend up and the walls for the pushrods are thin i'm told and come with sleeves.

Can someone elaborate?

joe_padavano

I'm guessing that the prior owner was using larger diameter (and thus stiffer) pushrods?

Chesrown 67 OAI

also its been know to enlarge those holes after a HUGE amount has been milled off!
Better ask more questions -- and especially get the seller to verify that there are no cracks in them -- or promise a full refund including return shipping if you test them and find cracks!! i learned that lesson the hard way with a set of "C" heads I bought off of a seller right here on CLASSIC OLDS - not even Craigslist!!

72 cutlass455

When using stronger valve springs and higher lift cams a thicker larger diameter rod is cheap insurance. Bending rods loose power and can fail.