I have an 83 FJ60, so it should be the short H42 tranny (vs. the 4"? longer H42 in the later model FJ60's). I know the Mark's adapter (4 7/8" thick) mates a SBC to the H42 tranny and puts it into the correct location for distributor clearance and fan placement. ~$1200 If I get the AA adapter, 712532 - $379.50, it requires the motor to be moved 3-1/2" forward to clear the distributor and for fan placement. Q1: If I get a later model H42 or H55F (which is 4" longer than my current tranny) and an AA adapter, I won't have to move my tcase and get new driveshafts due to the tranny length change? Q2: Is the shifter location in the same spot on the early and late model H42's? If so, it still puts the shifter in a bad spot?