Quick answer would be awesome as I'm elbow deep in this mess and at a stopping point. I can't quite find a straight answer when I search. Did the 4.2 ever have a balancer chain on the opposite end of the motor? Was about to pull the rear main seal off and look, but appears to be some kind of special white gasket, didn't want to pull it if there is no chain there and deal with finding or making a gasket. The timing chain kit I purchased specifies it is only for the 4.2L, and it came with the smaller chain for the balancer (triple or quad style links), for some reason.