I'm sure I'm making this harder than it really is but please help. I have a 72' fj40 with a 90' 350 and the original 3 speed tranny and t/c. I am trying to put in a sm420, I have the adapter kit for the t/c but do I need anything special to connect to engine? Do I need to use the toyota 3spd bell housing or a chevy bell housing?