disclaimer: new baby = little sleep = i get my best wacky garage work done.
disclaimer 2: sorry Javelin, you expressed interest in this stuff last year and i never got back to you due to me being busy, and luckily for me i found a use for the stuff.
last winter i purchased a used electromotive EFI system for which, luckily, there is still support and updated tuning software for, at the swap meet for super cheap. the wiring was a nest of mess as it was run on a dyno, maxing out the injectors trying to fuel a 500 inch big block, and tossed in a box in a heap in favor of a carb. it came with a crank sensor bracket for a pontiac, and a blank trigger wheel with a small center hole.
i have a new project car that came with a good running 350 with a brand new shiny carburetor and a nice clean HEI distributor. the carb has hood clearance issues with the air cleaner on, and the throttle body is a good inch and a half shorter at the air cleaner mounting surface, so i did what any sane person would do. i yanked off the carb and pulled this dusty old EFI setup out of the basement.
step one was figure out how to machine a blank trigger wheel while keeping to the .003 tolerance required by the book for the crank sensor. i measured the crank bore on the balancer and verified my measurement via the internets. 1.244-1.247 is the generally measured size, so i took to harbor freight to get their step drill that has 1.25" size. boring the center to that diameter lead to a very nice fit on the crank pulley.
step two was either awesome luck or i have a highly calibrated eye. i sharpied the location of one balancer hole on the outside of the pulley by eye, then held the wheel/pulley where my sensor was going to line up with the proper tooth, and marked two holes on the wheel through the holes in the pulley. center punched by eye, drilled to 3/8, bolted wheel to pulley and marked/drilled number 3 and the whole deal bolted right to the balancer. i was concerned with runout, so i mocked up the crank sensor and set the gap to .032 then rotated the crank slowly with my eye on the sensor to wheel clearance. once around looked great, so i rotated again testing my gap at 4 points and my feeler gauge read true all around.
i am very proud of either my skills or my eye, whichever it is i wired it all up test like and sloppy with the unit sitting up on the intake, and i'll be damned if that pig didn't fire right up.
