I am building a 1990 ram 150 4x4 with a seemingly gutless 318 in it. I also have a 1992 318. Which engine should I build to put in it? And if the 92 318 magnum then how easy is it to drop into while using the original tranny and wiring

 

Early 90's You could have either motor. How many bolts do the valve covers have ? 3 across the bottom would be a LA 4 would be a magnum