Ok so I've got 1973 CJ5 with an extremely tired 232,or 258?, and I have an opportunity to buy a running 304. What all is involved in the swap? It still has the factory dana 20 and t14 trans. Also what all is available used and aftermarket and what all will have to be fabbed? I know I could just rebuild a 258 and swap in but I'm a big believer in "There's no replacement for Displacement". Thanks for the help.