My engine does have the piston squirters so will take a turbo but is starting to burn lots of oil so a rebuild or new engine is on the cards anyway. Von can do a turbo, he buts the turbo further back so you don't have to mess with the cab in order to get it to clear. However, the camper cab is already lifted about 3 inches due its suspension mount so a standard turbo motor will fit. That is the current plan and I hope to get at least 170hp, maybe more but the deciding factor will be keeping it cool.
If this plan doesn't work then plan B is to take the turbo engine, put the old manifolds on it and move the turbo back. This will seriously increase boost lag but its a mog and when you need the boost you need it for a long time so the lag shouldn't be an issue. Von is a big fan of the remote turbo on the older trucks because the run back to the intake acts like a small inter-cooler and there certainly is no room in the engine bay for a real inter-cooler.
Chas, how heavy is your 1250 with a trailer? you must be as heavy as my camper, I typically run between 11,000 and 14500 depending on how loaded I am and how much fuel/water I have. If I am doing a long run or a run in the mountains I tend to keep it on the lighter side it at all possible. 50 maybe wishful thinking simply due to the horrible gearing on a 416 - 8th is almost half the gear of 7th!! I would have to be in 8th gear to do 50 which is not going to happen. If I can red line 7th in the mountains then I would be happy, that would be about 43mph.
Finally Mark Mitchell has rebuilt om366la, 240+ hp. I don't think that can be shoehorned into a 416 - thats probably a good thing.
Thats the current plan, I hope to get it done before summer.
Rob