"Gino Cetani" Quite suddenly blurted out in public news:tn8La.25043$ snipped-for-privacy@bgtnsc05-news.ops.worldnet.att.net:
I need some advice,
> I have just installed one replacement cylinder head on my 1974 Chevy
> truck with a 350 engine. During the installation I noticed that the
> push rod guides in the cylinder head are round rather than the other
> sides sloted. The holes are much larger than the push rods. Will this
> work? I am afraid it is going to cause all kinds of noise once
> running. Are there different pushrods for this head? I don't see how
> even a different push rod will work because the holes are completely
> round. I don't recall ever seeing a small block chevy head with these
> round holes as push rod guides. The head I have does not have screw > in studs.
>
> thanks in advance
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What you're referring to aren't guides per se, but just push rod "channels". Guides are separate steel plates that keep the push rods from "walking" under high RPM's. The replacement head should perform just fine unless the push rods are actually coming in contact with the channel holes.