I'm too lazy to look it up but I think Gary is correct regarding the bypasses. something about keeping the engines seperated or their vapors or something.
Shaun I forgot about the stock DF mounts but you're still putting the tires, brakes and associated airlines pretty close to the hot section of the motor.
I'm good for a case of Corona, @ 36lbs. as AD jr would say, "bring that weak *****"
besides how much more can one more 120 and the associated components weigh??

we'll find out in say 6 months??
c'ya
buck