440 into 64 Valiant?

I've got a 440/727 in a 65 Valiant and down the road from me is a 64 Dart 440/4spd. I don't know of any way past fenderwell headers and the commercially available ones (adapted from 67-Later A-body spec) all kill ground clearance by wrapping backwards to a horizontal collector. Mine were custom made 3/4 length with the collector pointing down allowing a turn backwards, higher up. I've seen B block (383/400) early A's with cast iron manifolds inside the fenderwells, but I couldn't tell you which manifold variation fit. Other problem areas are K-frame and lower radiator hose clearance for oilpump/filter and oil pan to steering linkage. Both 440 cars here have no heater/defroster (blower motor interference). My radiator is a factory 67 A-body big block repro and I use a mid 70's factory flex fan (some F-bodies and trucks). The Dart has a Ford radiator scrounged from a junkyard that fits really well but looks totally non-Mopar. Absolutely use all the aluminum you can, by the time you do that with the battery in the trunk you'll be no heavier than a stock small block on the front end but good luck getting anything but skinny rims while clearing the exhaust. I run a 2.76 Sure-Grip (cop car) rear with 275/60 15's in back. Combo of light car, big motor and tall gears is a blast. Building a second block now at 505 cubes... Don't be thinking of it as a drag car unless you back half it with slicks and a cage. You won't get 60 foot times out of it otherwise.