Well, after part one of this, knowledge and wisdom dispensed and additional thought beverages consumed....I was at the point where the 5.0 ford was going to get hooked up to the 84 mini truck 5 sp tranny and get put into the bull pen for the FJ40. Others had very good suggestions for improving fuel mileage etc..., but recall I currently own all these bits (5.0 ford) and a complete 84 sr5 4x4 pu). Much of the discussion focused on the fact the the little 22R power plant would be gutless having to slog around the additional mass of the FJ. I searched about and found that the 22R could be greatly improved in HP however, torque improvements were not quite as dramatic (the CI analogy here). So I have to ask what does the 73 FJ40 weigh and what does the 84 mini truck weigh ?? Well, from the links section here into offroad.com wherein it is written an F motor Hard top weighs....3470 lbs.. ??? Hmmmm...finding out the weight of my truck online was a little more difficult, fortunately one fellow put his on a scale (albiet an 85) at 3750 lbs. Checked my owners manual and drivers door tag to see if I could confirm the 3750. GVWR is 4800 lbs. Owners manual says max cargo capacity 1100 lb. Subtracting b from a puts the truck at 3700 lbs. Can this be correct ??? Is the FJ reallythat light ??? If so, well doesn't this change what gets put on the engine stand ?