Will this parts combination work for a magnum swap?

'96 is OBD-II. I think '96 and '92-'5 share a lot of sensors. There's a lot of 1 year only stuff on '97s, and then many changes for '98 and I think '00 as well.

Even if you did source a trans and some other bits from something else- having a whole donor truck is gonna be a good bet.