....or you could just build a 440 with the distributer in the back!

Here's mine in a demon

Here's mine with a 340 k-member and reworked factory motor mounts. You can sorta see where the fenderwells were cut out for the Hookers, but I was smart enough to get a set of Proparts headers from Mancini awhile back when they were only $500. I also have an original B-body radiator, Moroso oil pan and Milodon external oil pickup. It is all a very tight fit and a bear to change the starter or certain freeze plugs (of which I have done many!) If you are building a race car I would agree that cutting the inner fenders out is the best plan. If a street car I would get the 1-7/8 chassis headers.

A 440 A-body is easy 10's with a mild engine and it will go 400-500 runs with little maintenance.

It ain't that hard to do,and the maintenance isn't bad IMHO... We have a 1971 Demon we have used both 383 and 440 engines in it. Motor plate,small Mopar starter and we used Pro Parts headers.Currently I'm putting the car back on the street,so I changed the headers to Schumacher headers and 2 1/2" exhaust,and put a 3.90 gear in the Dana.Only spark plugs that were a pain were 5 and 7.The radiator came out of a 71 Fury,and we use a trans cooler.To me,it's a easy swap.