First, I noticed you are located in California.
Remember, that it is ILLEAGLE to place a 2WD engine into a 4WD chassis.
If you are not intending on refereeing, smogging, and daily driving this conversion in CA, then what year is the engine? Is the seller willing to sell the cat(s)? How about the o2 sensors? Any fuse boxes or interior wiring included?
BigMike