Yeah as the subject stated. I'm rebiulding my S10 it's a 91 single cab has a 2.8 v6. I'm researching I want to put a 4.3 in it. Dont want to race it just beef it up.

 

welcome to the forum. sounds like a fun project

 

What do you want to know.
The mount off the 4.3 donor should mount just fine. I am pretty sure you will need the comp. I don't know if the wiring harness is different or not. You will need to check on that.
If you have a question ask. But you need to do some checking before you just tear into this. Although it does sound like a great project. Just be careful you will find yourself way over budjet very quickly.