Bob:

I used the original scat tubing, just covered it with adhesive backed aluminum tape.  The new routing is shorter and uses less tubing.  I dont suppose that the delta T will be much but every little bit helps.

Many years ago, I had one of the original engineers on the IVP tell me that, at best, the cabin inlet air from the 3rd intercooler would be at least 116% ambient.  I suppose that was with the original routing over the right turbo.  That remark led me to install air conditioning which,being from the west coast, I admit I havent used all that much.

Regards, Bill Hogarty