On my 90, I built a 383, did the vrfpr, ran a 7.4L TBI with the 2" factory spacer that mounts to Edelbrock spreadbore mani. I think the cam is a comp 268 roller. Oh, and I run the FLASH ECM. I finally got it to run, but really badly. Could seem to get it tuned. So, I'm in the process of slapping...