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LS short box · 02-15-2023, 05:52 PM

I would contact Speartech and see how their LT1 ECM/TCM rework/base tune and harness would price out.
Not an LT1 but on a LS3 swap we did into a 73 Z28 with a TKO 600 we didn't need a TCM. If it was an auto you need the TCM/harness.
If you are keeping the LT1 stock the base tune should be really close.

02-15-2023, 05:52 PM	#5
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,953	Re: Junk yard motor LT1 I would contact Speartech and see how their LT1 ECM/TCM rework/base tune and harness would price out. Not an LT1 but on a LS3 swap we did into a 73 Z28 with a TKO 600 we didn't need a TCM. If it was an auto you need the TCM/harness. If you are keeping the LT1 stock the base tune should be really close.