got a bleed line on the highest point in the engine so that air can come out. I haven't enquired a high capicity one. thought this would do the trick but its all guess work.

There is some room to fit an intercooler in front of the radiator. But thean the chargepipes will be verry long and diffucult to make.

Some one that has the same engine but running 380hp twin turbo has an custom radiator with the normal xr4i length but also experience about the same problems.