about that manifold and turbo issue, see the thing is, I've got a nice 115 with a wasted engine and a turbo trans and a number of other bits and pieces. I'm currently searching for a 617 so I want to make the right choice of course. You say you know for sure that only the 85 will clear? Is that a 49 state 85 vintage 617 or is there something about Cal. models, maybe any year that will work? I'm getting a bit confused! Also, I have seen in person a conversion done with a non turbo 617 and the owner/mechanic had cut the frame brace bar that runs down from the near the center of the firewall kind of up high and it normal runs down forward to the body frame rail. He had modified this piece to be a removable/replaceable piece. After the engine was in place, he replaced it with some slip over pipe or tubing pieces that were drilled and bolted back over some stub pieces that were left in place after cutting out a section in the middle. This allowed the clearance for the original oil filter housing. Anyway, I'm really interested in this manifold/turbo issue.