Need a radiator solution for a 69 dart

500 is going to be extremely hard with new, good quality components. i'm not saying it can't be done, but you'll need to be selective and shop around.

you could try something like this move:

https://www.summitracing.com/parts/rad-mop756a/make/dodge/year/1969
and then adapt a shroud as shown here:

Cold Case Radiator Shroud?

fans come up here frequently, clutches can be had reasonably from rock or napa, etc. so there's not really a need to splash the pot with a resto fan package unless you just want to press the easy button. if you have junkyards near by, you can generally scrounge up most of the bits.

but getting a good, efficient radiator is the king pin to the whole operation. spend that big chunk of change wisely.