I'd use the serpentine setup, and use a box out of a magnum VAN, it tucks up nice and tight to the engine and doesn't require battery box modifications, you also need either a o-ring to inverted flare conversion fitting from speedway; or another fitting from an older saganaw box. Consider 'mopar magazine: pump it down' as well.
#1 The heads crack, sure, that doesn't guarantee it will ever hit water.
#2 Elongating one bolt hole on the flex plate for the converter.
#3 Getting a center sump oil pan, and dipstick; use the OLD VERSION 360 cork gaskets!!
#4 Slapping an Edelbrock 7577 on; No crossfart business, been there done that... I recommend tapping the smaller water outlets the other side of the intake to 3/8" NPT so it clears the serpentine mount, BEFORE installing it. I got my drill bit and tap of Amazon.com for a song...
#5 for god's sake; use a 195 degree thermostat!
#6 You MAY need to play around with different lower rad hoses because the pump comes in at a little different angle on magnums, I modified a Dakota hose, a little close to the belt, but works great.
#7 Speaking of belts, just use a non-a/c belt and route it accordingly, it will by-pass the idler pulley.
Your in business. No fancy balancer needed unless you want one..
