Re: Improvised 470 engine tools
Oil pump alignment tool for part no. 91-14822 that apparently is NLA for real.
I made three collars out of Corian material like so: First I squared up my drill press table. Then I drilled three holes in the piece of scrap just slightly smaller than the hex shaft. Then I went almost all the way through again with a bit just slightly larger. This left a lip on the inside of the hole. Then I forced the collars onto the hex shaft. This left the collars snug on the shaft. Then I glued the three collars together after cutting them out.
I used the spring, washer, and steel drill bit stop collar to hold the Corian collars tightly against the gear body. This both squared it up and stiffened it so it could be used as an alignment gauge.
When I mounted the distributor on a vice and spun the shaft, it was not by any means perfectly straight, but I definitely got it to within about .010" to .015", compared to the 0.150" of play it has without the collar. I'll bet I could shove that Merc alignment tool in my block and get that much wiggle (.010 - .015" that is).
When I inserted the distributor into the block, it was stiff enough to move the oil pump to the correct alignment, as opposed to the distributor shaft moving to the pump.