In 1980 the 302 should be a carb/distributor setup, is that correct?
If so are you staying with that, or going to EFI/distributorless?
Best fit for manual trans will be an M5OD-R2 from a 1997-2003 F150 4x4 with 4.2l V6
The later model 4.2l V6 has the same transmission bolt pattern as the 302
Rangers used the M5OD-R1, the M5OD-R2 was made for full size trucks, w/V8s, and has shifter coming up thru the floor at the same place as the R1
Also get the transfer case with the 4x4s M5OD-R2, if its electric shift it will work fine with Rangers electric shift
You can use older truck manual transmissions and transfer cases from a 302, the shifter will come up thru the floor just under the dash on the tunnel, so you will need to custom bend the shifter to clear the dash
Yes, you will need to retro-fit driveshafts but you have to measure once engine/trans/transfer case is IN, there can be differences in ANY drive train swap, so "this fits" is not always correct for all swaps
Your 1993 4.0l Ranger will have 8.8" rear differential which is fine to use with V8 power
Front in 1993 4.0l is most likely a Dana 35, but could be a hybrid Dana 28
3.73:1 ratio was the most common and fine to use unless tire diameter gets above 31"
4.10:1 is better as tires get bigger, even 4.56:1 when they get "real big", lol
You can check what you have here:
https://www.therangerstation.com/tech_library/axle_codes.shtml
Book mark this page:
https://www.therangerstation.com/tech_library/index.shtml
Answers to most questions will be there
Look in Conversions section at the bottom