Great Ches,

before it all goes in, again, considering it was all no cost to you so far Id do the following. New cam and lifters (preferably and Rv/Truck cam grind) maybe even a set of push rod for $25. New timing chain, new oil pump...this way you can get some new crank seals on there, which are probably leaking anyway. For the trans drain as much fluid in it as possible including the torque convertor, put in a new filter and while your at it, if it were me, a shift kit to make snappier shifts, and help trans last a little longer. Most shift kits are do it yourself projects if you just follow the directions and you can get a B&M one for about 50 bucks. Finally If it was me, considering age of motor Id do a water pump, and fuel pump as they are cheap enough and something less to worry about that moist likely in near future will break.

A new cam with a shift kit will make that truck haul ass compared to that 6 cyl you have. Good luck buddy.

Scott