I am working on a similar renegade conversion. I went with a 2001 Corvette LS6. I'm working with a 'radiator up-front' setup, but I ran the cooling lines through the heater vents rather than under the car ... I just coudn't route the line through the front suspension. 930 Tranny with 930 suspension.
I ended up using a set of JBA headers made for a Silverado (JBA-1850S-3 ), they cleared the Renegade engine mount, my original LS6 headers didn't.
I working on the fuel cell mount right now. good luck with your build!
