Personally I would delete the OBD1 stuff entirely, EFI Connection 24x reluctor behind a Holley vortec timing cover, convert to coil near plug, get an inexpensive LS swap harness and use a DBC 0411 or P59.
The early GM MAFs are garbage and the only 165 I have ever tuned I went to $12P MAP based code in.
USA made swap harness I am about to use to replace the Proflow 4s garbage ECU setup I am currently running.
https://highperformanceinjectors.com...lhi-connectors
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