85 hatchback

i got a 85 hatchback 2wd. my local junkyard has a 4wd justy i can get a great deal on the 4wd system is this possible also how high can i go with my hatchback or who makes a kit. i went to the link but it says ea 81 my engine says 71 what is what.? any help please

i have a 85 hatchback how do i know if its a ea 81 the engine says 71 any help would be beneficial

just got a 85 hatchback 4sp 2wd and found a 89 justy 4wd at the junkyard .i can get the complete 4wd system cheap is thi swap possible or is it not worth the hassle.anyone know how difficult it is to convert a 2wd to a 4wd.