I'm running a 250 in a 64 Chevy II, note that if you ever consider adding AC the HEI unit may not clear your compressor brackets. The stock comperssor for a 250 works, but is ugly as hell, and all of the aftermarket kits won't work with the HEI, so you either have to go with points or the pertronics. If it benifits anyone I have found that you can take the upper stock GM bracket and adapt a sanden compressor(the ones you see on all the street rods)these can be found on a lot of jeep or chrysler cars. It mounts with one long bolt, and a couple of heim joints for a tensioner and your done. The compressor mounts rather high which looks really cool and on the Chevy II it posed no hood clearance problems. Right now I'm running the stock point set-up, but i have considered changing to the pertronics module. i have seen recently on ebay a couple of magnetos (a wico & a bosch)for the 194/230/250/292, does anyone know if these were used on some industrial application? A mag would look really cool, though i don't know how great low end performance, or dependability would be. i know mercruiser used the 250 and that the finned valve covers & side cover were a great upgrade for my motor, it would be interesting to know what other offbeat applications the inline was used for and what parts may interchange. sorry if i have rambled on. thanks, mark.