Will the injectors from an 8.1L fit the 6.0L engine? If they fit, would they support 8 lbs of boost? Would I need a different harness and fuel rails?

 

Yes they will fit, but what you are looking for are 8.1 MARINE injectors. The are 43lbs/hr and a direct swap in. Should come close to keeping up with 8 lbs on a 6L depending on how many RPM you turn it, but that's about the limit.

 

Thanks for the info, I thought the 8.1L ould fit but forgot they had to be the Marine type.

 

they will fit but they won't flow enough for your needs they only flow at 36.4 at whatever our fuel rail psi si.