1987 Dodge D150 pickup 5.2l 318 cid

I have has 0 luck of finding a 318 transmission in my area KY for my truck so plan ig in long run will be to buy a new one.... Advice????? Does anyone know how it would work too fitment to put a Ford 1976 360 motor in my 1987 Dodge D150 pickup 5.2l 318cid my Dad has one bored camed still wrapper on a pallet plz lmk ??