Hi guys, I currently have a corona lift back(rt132) with a w 50 box. What I cant seem to find anywhere is if I could fit an a40d(I think this is the coade for the 4 speed auto) up to the 18rc donk. I have had a 3 speed auto in the car but it just revs way to hard. Any ideas what the auto box in a st141 is? Would it accept the bell housing off the w50? The car came from the factory with a w 50 and when my dad got a bit to old(82) for gears we put a auto in it, suited him fine as he never did any more than 1000k a year in it. I now am back to the gears (yes I am getting good at changing boxes) and am toying with the idea of droping my revs on the hi way, I am running the 3.9 diff so looks to me the only way out now is if the 4 speed auto will fit. Cheers, guys.