Mine is a 96 that had 90k on it, came out of a front end crashed truck and looked REALLY nice inside.
Went the EQ heads route with the LA drilled intake pattern.
Aftermarket Magnum pattern intakes are either kind of expensive, or cast cheap as hell and the LA pattern gives a TON more possible intakes that can be used.
Changing the cam can be a bit of a can of worms because the stock Mag doesn't have much lift since they are truck motors and designed for torque.
You might want to talk to Evan (magnummopar) on here about those EQ heads when you can since they open up so many possibilities over stock Magnum stuff.
I realize you said you are on a tight budget right now, but those heads may save you a lot of headaches and expense down the road.
When you pull the stock heads look right between the two valves on all four corner cylinders as this is where the stock heads typically crack.
Cracks don't necessarily mean they are dead though, as a lot of Magnums have cracks but show no signs of a problem.
Would also be nice if the flywheel/flexplate comes with it, as they are balanced for that motor, and by elongating one of the converter bolt holes about 1/8 inch bolts right up to the 904 or 727 converters.
This just some stuff I learned along the way when I swapped mine.
Hope it helps.