adding magnum 360 parts to la 360??

hello..i have a few questions about a motor i'm currently building for my 73 duster..

here is what I currently have..78 cordoba 360 motor..motor is rebuilt fresh from the machine shop..its .30 over with 10.1 pistons, 280 magnum comp cam, double roller chain, .10/.10 on bearings..

question #1..i currently have the stock 78 heads..i know the magnum intake wont fit the stock heads, if I change to the magnum style heads, I should be able to use the fuel injection from the newer motor??..what parts do I need to get from donor vehicle to make the fuel injection work? and does anyone have a link to where I can find the wiring diagram to make all this work..

question #2..i also want to switch from the single belts on the old style to the serpentine belt system like the newer motor..the duster has power steering and I will be adding a vintage a/c system to car..what parts do I need to convert my motor to the serpentine system? id like to use all factory parts since they are easily obtainable at local junkyards..

question #3..currently have a 727 but id like to switch to the newer tranny with overdrive..what tranny is recommended for a bolt on conversion..also worried about balance on torque convetor and flex plate..what harmonic balancer should I use to eliminate any vibration problems?

this is going into a 73 restro mod im currently working on and any help with these questions will be appreciated..