All of those measurements are the same. The 153 is 2/3 of a 230 six cylinder. There is also an HEI distributer for the six. I have a couple around here somewhere if you need pictures. We put a GM TBI on my 270 GMC as a demo a few years ago it took less than an hour to get it running. Your swap should be easy.
Last edited by Beater of the Pack; 08/02/14 01:27 PM.
