BBC push rod mystery
I have a 1976 GMC truck454. After a (long ago) disassembly of the valve train, I replaced the rockers, cam & lifters with Comp Cams stuff. I thought I had lost the push rods, but just found 'em. Here is the problem: I ordered new magnum rods, 3/8" O.D. as everywhere sez that's the size the 454 uses. But,when I went to install them, they're too big for the guides. But, Comp Cams sez the 5/16 rods are only used i small blocks. I did eventually look at the old rods, sure enough, they're 5/16 O.D. So, *** have I here? I sure don't want to install new guides, as I could booger a head gasket, or two. They (CC) said they wouldn't warranty any parts if I use my old rods. They're straight, etc., just old. Any suggestions not involving Tannerite or Thai hookers?
Last edited by 68NovaSS; 05-02-2013 at 08:01 PM.