So I recently replaced my injectors, the truck runs great. The problem i have now is i have a fuel leak at the rear of the engine. I think it only leaks under load, because it does not while idling in the driveway. But drive it and it is dripping off the bellhousing. Any ideas guys?

 

A cracked line to #4 stick was famous for this. Worth a try, but keep your fingers away from it while pressured up.
Back to morning brew . . .

 

Check the return on the back of the head

 

I second the banjo bolt on the back of the head, check the copper washers.

 

Could not find a leak, replaced the #4 line. Problem solved.