I'd think you could do a pretty good job of test measuring, off the stock 3.0, if you do this first. Measure the head rise off the block of any dohc head and add the 19mm of extra deck height on the 3.5/3.8 block. Measure that dimension off the block deck (top of exh mani) of the stock 3.0. Losing the big old hunky vac brake booster with a hydroboost PB booster frees up a lot of room on the dside.

I don't think engine height is a factor if you use the 3.5dohc intake with maybe an enlarged TB bore. Can somebody aim me at a diagram of the tt exhaust mani/turbo mounting?