Motor home 727 in duster questions

This is why i'm giving up on mine, thousands and thousands in parts and i still don't have everything i need. I didn't even want to put a 440 in mine but a MH 440 was the cheapest engine i could get.
unless you are trying to make it look factory stock, what is the hiccup? It might help the OP also, so as to not totally hijack this. I have done it without issue.