Hold down clamp for HEI in 235/261 Chevy: Speedway part #91044030---$10. Works on 216 also. We use a really tight fitting neoprene "O" on the distributor housing for a stop at the right depth for distributor into oil pump setting. Don't have a pic of a Chevy but have one of my Buick which is a 235 with two more cylinders. Housing is larger in diameter than Chevy so used turned down V8 Olds with a shortened V8 Chevy shaft. Not a project for most home garages but has worked great for years. Use junkyard dizzy and NOT the $59 ebay junk.
Note the points parts are all still in place and points dizzy is in trunk.
[img]https://i.postimg.cc/CdcFrsHp/Dar-Dog-HEI-003.jpg[/img]
