I found the copies of this and they contain info from both the SB and a FMC Canada shop manual. Here is what is not in the US SB from "Power Operated Tops Hydro- Lectric Type 1946-8 Ford and Mercury" "Forward and backward adjustment. (clearance at windshield header when top up) If top is too far forward or does not move far enough forward to permit windshield header dowses to enter dowel holes in roof rail, adjust as follows: Raise top slightly above windshield header, loosen attaching bolts in corner braces at front end of side roof rail, move front rail forward or backward to align dowels and dowel holes (attaching bolt holes are slotted to permit this adjustment) tighten attaching bolts.
Up or down adjustment (clearance at top of door and quarter window) if side roof rail too high or too low when top is up, unlatch top at windshield and raise top approximately halfway, remove rear seat cushion, back and quarter trim panel. Loosen three plate attaching screws in top adjusting plate at rear section of body, move adjusting plate down to raise side roof rail or up to lower side roof rail (attaching screw holes are slotte4d to permit this adjustment. Folded top position adjustment. If top does not contact bumper in each side of top compartment when lowered, loosen attaching screws in top adjusting plate to rear slightly but do not raise or lower the plate. Moving plate to rear will allow top to lower further into the top compartment.