The Duraspark is very reliable when there are no modifactions/different parts in the mix. My 76 that I bought new is still running with the original distributor, control box and coil (can type). Only the wires and plugs have been replaced in 35 years. (120K miles) YMMV.
Not telling you what to do, just suggesting that you might want to save the money you would spend on a DUI setup for other more necessary things, until you get to the point that everything is running good and then decide if the DUI would be a good return on investment.
1 "76" F150 RC, LB, 2WD, 300, NP435, 9" open 3.00, special order 2-76/Delivered 4-76. Still "new".
1 "73-79" F150 RC/SS/SB/4WD, "84"-300, T18, NP205, 9" open 3.50, Dana 44 3.50 open, Offy DP, Holley 470, EFI + single 2.5" exhaust. Gathered from 15+ donor/parts trucks. "Fubar". Runs good, safe, still needs details/project continues.