My old 74 Dodge truck is needing a fresh engine and I would like to swap the original 318 2bbl auto for a 5.2 Magnum. I have a the opportunity to buy a 99 model out of a Dakota. Any tips or tricks involving this swap? up

1968 Plymouth GTX
1974 Dodge P/U Long Bed Stepside 318
2019 Ram 2500 6.4, auto, 4WD