Senior Tech Team
Join Date: Feb 2005
Location: Long Island, N.Y.
Re: Chipped Guide
Hi Bill, those guides in that 409" head appear to be the originals, but machined for springs/seals?
The "missing" first couple threads along with that small circular "cut" at the top of the good guide are indicative of the knurling tool used, they were done using a "UTP" knurling set. They came with various size wheels, the wheels started the threaded section about a 1/4" down in the guides.
Thanks, Gary in N.Y.
P.S. That damage is an easy fix for sure, over here we would simply use some .500" O.D. guides with a "step" already at the top to accept a .530" seal. Here's a shot of a few, they can be in "cast" (OEM style) or "bronze" if preferred by the customer!
Sept. 2019 Drag-Week Winner - N.Y. Legal Streeter - 1956 Chevy Bel-Air 7.23 @ 196+ @ 3800#
Best time to date-11/2019 7.00 @ 204+ @ 3800#