Finally, after a month and lots of little Gremlins along the way, I have been successful in installing a 96 4.0 head on my 258, along with a header and 2bbl Weber. There are still a lot of loose ends to wrap up, but it moves under it's own power (quite well). I can't do an objective analysis of performance yet as I'm running an open header. I'll do a write up of the project sometime and post it on the internet. Any one in the L.A area (Burbank) have any interest in a 73 258 head, manifolds and valve train componets? -- Daniel Modlin mailto:dmodlin@xxxx http://home.earthlink.net/~dmodlin Burbank, CA ICQ #4076445 (insert amusing line here)