Posted by: Macgraham
« on: February 03, 2012, 06:09:09 PM »I am going through the same questions. I have an engine with the small diameter dist Autolite no.4177-1. says it will fit all l 134 engines. I switched to an Autolite no. IAD 4008 which is the larger diameter dist, with internal condensor. I think you need a cap for the 3 1/2 inch diameter 4008. Mac