OBD2 computers (like the '0411) require both a cam and crank signal input. The SBC OBD2 cam signal input is a 2:1 ratio to the crank input. Generally, OBD2 computers have better aftermarket support than OBD1 computers.
EFI Connection offers several options to convert opti spark to the OBD2 '0411 computer.
https://www.eficonnection.com/home/c...efi-24x-lt1lt4 With some reverse engineering, an A La Carte option of leveraging EFI Connection components to the L98 could be a solution? Obviously reverse engineering is not a "Dirt Cheap" option. Obviously a hole in the intake = "Dirt Cheap Option"
dave w
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