That's an engine building issue -- not an LS vs SBC/SBP issue.... Motors are motors I've had a bunch of great SBC's and a few POS SBC's.... The Mustang motor couldn't make 3 laps with one engine builder - and is fantastic when taken to another builder.
There's no sensors required on a CARB'd LS motor.... only a coil (timing) controller made by MSD.... which is as simple as an MSD box on your distributor.. the big difference is you're not driving the distributor (there is none) and the oil pump off the cam.
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