Radiator and Driveline help

I have an 8 3/4 for an a body ready to go.

My question is what could I steal a driveline out of that could be cut down in length and fit and what size minimum radiator I need....
Follow Mr. Shumacher's recommendations...upgrade brakes..upgrade cooling etc...he suggests getting another radiator and cut the hole in the radiator support to allow maximum amount of air...this thread will show you and alternate choice...one that I researched and am sharing....

http://www.forabodiesonly.com/mopar/showthread.php?t=100851

When you put a 440 in an A body the distance from the tip of the water pump to the radiator core is anywhere from 3 1/4 inches to maybe 3 1/2 inches..this limits what kind of fan you can use..some say that a Hayden clutch for a Jaguer would work...I did not go that route..I had a 18" flex fan and shroud and it did not cool for me..8)