[454_72_4X4]

Use v8 mounts. They're a million times better and easier to work with than the 2.8 conversion mounts. Any old mount out of a mid seventies car or truck will work. The clamshell type.
Some trucks use a taller shell so ya wanna stay away from those.
I think I've still got scans of motor mount adapter plates if ya need/want 'em.

Like someone above said, the 4.3 mounts are junk.

Alot of guys like the 2.8 mounts. I don't because they have the offset plate where the actual mount sits behind the mount bosses on the engine block. Just seems like it would pull at a strange angle on the engine block.

I used a custom 4 core rad from Superior radiator for my 87. It worked really well and is now 13 years old and as far as I know still working just fine.
It mounted inside the rad support and I used a 19" flex fan with a shroud I built. Also a long water pump and a 1-1/2" fan spacer.

I haven't made up my mind on which rad I wanna use on my Sonoma though. I want to keep the AC so I gotta have room for the condensor?, (condensor or evaporator?, can't remember which it is up front...LOL).