2 was the first year Ranger got the SOHC 4.0, prior to that the 4.0 was OHV. Any of the OHV 4.0's should work fine but be aware that in 1996 OBDII was implemented so he can plan on swapping his intake onto any OBDII 4.0 (and actually, OBDII started to appear somewhere in the 1995 MY). There could be other variations that would require swapping intakes, he'd just have to look and decide is all. Same can be said with exhaust manifolds. Also worth noting is that 94 4.0's sold outside of Kali did NOT have EGR where as Kali versions did; possibly another reason he might find the need to swap intakes.