OK- - - -I was about to do the "measure the offset" procedure, but drawing on the collective wisdom of the forum usually gets an answer quicker, and more accurately. The 1.5:1 small block rocker arms sound like a better choice. I'm thinking of installing a piece of flat steel in place of the rocker shaft with screw-in studs aligned with each valve stem, then using a roller bearing rocker at each stud to move the valve. The studs for the exhaust rockers will probably have to be installed at a different angle than the intakes to keep the geometry right. The end result should be a valve train with a lot less friction loss than the old shaft system and lighter weight components- - - - -especially if aluminum roller rockers are used. Hardened steel custom-length pushrods from Comp Cams, and pushrod guide plates should keep everything aligned properly. If I use hollow pushrods and modern design lifters, it will probably also make it possible to eliminate the antiquated rocker oiling system the stovebolt engine uses.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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