I'll second this, as someone who looked into doing the swap on my 89.
WAY more complicated than you would think.
One way to heat up the TBI motor is to switch to 1.6:1 rocker arms.
About an hour's work, and worth it. Exhaust mods would help as well.
Check out www.s10-4x4.org for more details.
Personally, I'm leaning towards a supercharger in the next couple
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