I think you will need the baffles in the 87 and later tanks for the EFI, to keep fuel from running away from the pickup. Have you checked into aftermarket tanks? They are about $100 or so down here, and about that in the LMC catalog. There is a section in the JTR manual about modifying your tank for EFI, but I am not a particularly big fan of welding on a fuel tank.
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1974 Jimmy- 5.3/4L80e/NP241
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