If the 1989 1 ton was a 4 door, it should fit as they are the same body style. They didn't change the 3/4 ton and 1 ton truck bodies til later.
You would have to do a lot of modifying on the body mounts. and a whole lot of other things.
where can i find a vaccum diagram for a 1985 Chevy truck with a 350 small block
It depends on the frame, if the frame on 4 by 4 is a 3/4 ton and the one on the 2 wheel is 1/2 ton then no they are not the same. The 4 by 4 is more heavy duty and can haul more. If you wanted to use the 4 by 4 with the 1987 Chevy truck than you will have to do some modifying because the 4 by 4 frame has 4 wheel drive. In most cases no you cant use a 4 by 4 frame for a 2 wheel drive truck. If you made the 1987 a 4 by 4 than you could use it.
it's a 1985 chevy...
You can purchase a 1985 Chevy truck for a certified used Chevy dealership, a standard 2nd hand dealer or from online auction sites such as eBay or autotrader.
It is made into the windshield.
If we are talking about the V-8, then yes.
No it will not it is all different, It won't even match up with the cab.
By law, yes.
YES. It is all the same. except the grill and lights but it will all interchange.
No. They changed the bed design in 89, I think.
So long as the bolt patterns are the same, yes.