Bill Hanlon OK lay an original 235 distributor out on your bench. Make your 1975 chevy pickup in-line 6 HEI the same dimensions as the 235 distributor. I took the distributor gear off reversed it put on a .030 shim washer above the gear and left some up and down "slack".030 would be fine. Next since I don't have a 21,000$ Bridgeport mill I carefully drilled a 3/16 ths. hole thru the distributor gear hole and thru the shaft for a 3/16 ths. roll pin. Next buy an 1-1/4 x 3/4 O.D. oilite bronze bushing at the farm store,usually in the yellow boxes about 3$ get a 3/16 by 3/4 long roll pin and a 3/32 by 3/4 roll pin 85 cents. Now below the distributor gear saw the bronze bushing in half ( or maybe shorten it to be the dimension of the 235 distributor from the block surface to the bottom of the gear.) This half bushing then pins on a stub shaft that is 3/8 inch longer than (.375) the original stub shaft so it reaches the oil pump. Measuring from where the 235 distributor sets down on the block to the lower end of the oil pump tang is 4 15/16 inches,same as the 235 distributor. The .488 shaft will not be a close fit in the bushing below the gear no problem there main thing is to not clamp the assembly tight with the distributor hold-down. The thrust area on that bushing is just flooded with oil. Use an old shaft with a tang already on it cut to length then grind ( or hacksaw a slot in it ) clean up with a file and pin thru your bushing to hold it on there stab it and check your up and down clearance. Your drilled hole should be thru the flat of the tang for the 3/32 roll pin. Mine is laying out on the tail gate PM me a phone number and i'll send you a picture. It's the best thing I've done for these tractor engines !! Oh Bill don't worry about bad feelings,someone commented about raw cheeks from comments on stovebolt,I nearly fell out of my chair LOL LOL it's all for fun with GM trucks !!!
Last edited by fixite7; 04/27/2023 2:08 PM.
