I also substitute the shaft from a V-8 distributor for the 2-piece 6-cylinder shaft, cut it off to the correct length for the 235/261 engine, and file the correct size and shape tang for the oil pump drive. It's a pretty easy conversion to attach the 6-lobe upper part to the shaft by either welding or brazing. The 2-piece shaft has a nasty habit of introducing a wobble if the housing is not centered perfectly in the block. In some cases, it's necessary to install a sleeve over the distributor housing to assure the distributor stays exactly centered in the hole in the block, then machine the OD for a close slip fit.
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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