My car is set up for a 4l80e, plans are for a 572 HEMI. I want something with a lock up convertor and that is electronically controlled. I know there is a place in Canada that sells an adapter to put a 518 behind a big block but when I discussed this with my friend that will be building the trans for me some day he just laughed......I will not repeat the rest of it because I know how sensitive some folks are about certain things around here.....