hi i have a1979 jeep Cherokee chief it used to...

hi i have a1979 jeep Cherokee chief it used to have AMC 6.1 L Engine but few years ago i did upgrade the car with a Chevrolet 350 V8 engine because i couldn't find the spare parts to keep it running , the point is by these days i started to have difficulties to keep it running due to the spare parts as well, i am in Egypt and i cant find these parts easily i have a friend of mine who have a Chevrolet blazer K5 1982 and he did modify it totally with dodge ram everything!! latterly everything its like a dodge ram wearing blazer cabin even the dashboard is for the dodge ram , my question is can i do the same for my car with a similar car ? i m thinking of grand Cherokee everything is it applicable or not in my case? thx in advance