74 cj engine swap

[55for65]

Hi all, need information for swapping a 79 AMC 258 i6 / 4.2l stright six into a 74 cj. 74 is a three speed, 79 is auto. Any information would be appriciated. Tks

 

[BrockGrimes]

These CJ5 's?
Also which 3 speed?
Which auto Transmission ?
What motor did the '74 have?