Originally Posted by Old40Dog
Thanks for bring up MHP. I talked with MHP & Gunn and I think I'm going to have Gunn do the machine work. Mountain High Performance seems to be really focused on modifying Cummins, Powerstroke and Durmax diesels for high performance. I'm more focused on keeping the Isuzu 4BD2 pretty much in stock form looking for longevity.
I have no experience with Gunn.
But Mountain High Performance has worked on Toyota Diesels for me, roughly a year ago I had them do the machining and valve seat replacement, etc... on the 3B head.