how much work would it be to take this d16a1, auto tranny, and ecu out of my 89' integra. and replace it all with a b16, 5-speed, and ecu?

just wondering, since i have to replace this d16a1 anyways, and the auto tranny is a dog.... I figure if the auto tranny by some cahnce would bolt to the b16 it wouldn't last very long.. correct?