Yes GM's 1500, 2500, and even 3500 changed very little from 1988-1988 and the 5.7 was an option for any 1500-2500 through those years.
Yes it will.
I don't know about mounting it, but the diesel motor is too heavy for the suspension on a 1500 (1/2 ton) truck.
No, not without major fabrication.
You would have to do a lot of modifying on the body mounts. and a whole lot of other things.
Yes, But it won't look right. 1988 is when chevy redesigned the body / changed it.
Not without modifications.
truck body computer
no, the body style changed in 1988 1981 thru 1987 are the same though
Nothing without fabrication involved.
82-04 s10 frame
NO it will not work. Everything is different. Cab mounts, body weith, ECt.
1988 to 1991 most parts are interchangeable - body styles an other things changed after 1991