LT1 Swap to LS 411 pcm
Although the video is 32min long for some reason, the gist of it is:
he converted his OBD1 LT1 into an OBD2 LT1 with a 96/97 front timing cover and added wiring for the OBD2 crank sensor
he repinned his harness into an 0411 pcm
he basically runs his OBD2 LT1 as an OBD2 L31
Of note, both the L31 & the LT1 both need only one coil to run.
In terms of inputs and outputs between the pcm and either engine, the distinctions between an OBD2 L31 and an OBD2 LT1 lack any meaningful differences.
Can't think of a cheaper way to use an 0411 pcm to run an LT1 - even though I'm not as imaginative and resourceful as y'all.
That said, if an OBD1 LT1 pcm can be coerced into reliably exceeding 29 highway MpG in an LT1 Caprice Roadmaster or Fleetwood without hypermiling, I'll be impressed regardless of how it's achieved, in inverse proportion to the cost, and not just because it would be novel.
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