Big Brain Garage '73 duster build

i have a 73 duster roller i got for $400 bucks! i would say immaculate condition, 2 floor patches and thats it. this thing is solid! i am piecing this thing together with what i can find and have on hand. all my $$$$$ is currently in the engine, most expensive part is the MSD ready to run dist. kit and the headers! as of right now i am in wiring mode, i have a harness from a '75 that i am routing and splicing in.
engine is a 5.2 magnum from a '98 dodge truck. JEGS heads, the old ones were cracked, comp cams roller .512" lift int/exh, .210int/.220exh @ .050, 112 LSA, RPM air gap intake and 600 CFM summit carb. ceramic headers.
Direction of the build, not really sure. first things first, get it on the road. i already fired the engine, i have no idea if the trans works (A904), i paid 100 bucks for it and carried it out of a barn. opened the pan, looked clean, installed new filter and shoved it in. 7 1/4 rear end, i have a 8.8 to install at a later time. i want to drive it first. i have '75 duster parts car with /6. i took the disc brakes from it, got a new master cyclinder and still have to plumb entire brake system. fuel system will be a clicky clacky from the tank to the carb. currently open headers, again, i want to get this thing running and driving! more pictures to come later and i'll update progress when i can!
feel free to leave advice or combos you ran in the past! this is my first mopar and i'm in uncharted waters!
Unless you plan to build that A904 into an A909, that 440 will make quick work out of that trans. I'd try to score a 727.