I'm getting things around to put a 6.0 (LQ4) in my 87 Blazer .
I read that using the Dirty dingo mounts and the Muscle car pan will allow this without cutting the frame.

So my other questions are do I change out the heater box for non AC or just by the block off panel for the A/C housing?

Also what headers work best ?

My brother is currently doing this in a 98 pickup and it's been a lot of work that others say should work....

He has had to massage his headers to work on the steering shaft.
Was told the truck accessories mount would work but power steering hit on the gearbox.

Just trying to avoid any of this I can

 

Following because I'm working on a similar project in my 87 Blazer