Is it the ls1/5.3 vortec? 1hdt? Something else?
I'm leaning towards the ls1 with a standalone harness. It just seems like fewer wiring nightmares wjth a 3 wire hookup to mr Ts chassis wiring. Am I thinking about this wrong? Of course with a cable driven throttle and not drive by wire. I'd like the cruise to work.
Mazda 20B for the WIN!! LoL J/K!
Pretty sure LSx series as you have mentioned for easy access on the engines and tons-o' parts. Already proven, plus knowledge base is there since its a pretty common swap on our 80s.
If parts were readily available I would go with a OM606 or 1hdt.