icanfixall
Official GMM hand model
Look at the block serial numbers located just to the drivers side of the injection pump gear housing. That will telll you 6.9 or 7.3 in the number. A 6.9 strats with those numbers and the 7.3 starts with those numbers in the serial number. As for the injection pump return line going back to the filter head. Thats not normal routing but it seems to work. Its an easy repair too.