I am thinking the parts in the first picture are a handmade version of a memcal. You might be able to use information on this page to help figure out how that circuit is wired. If you do, I'd love to hear more.
There are more pieces here: http://www.gearhead-efi.com/Fuel-Inj...your-Memcal-ID
Some of the links in the above thread are broken now. The exatorq link brought you to the schematics I posted earlier. Diy-efi.org is an old mailing list. You can follow the thread mentioned here. Also note the picture of the prototype ZR1 Corvette memcal. The ZR1 used an engine designed by Lotus and what we can see of the memcal in the photo looks very much like what you have.
I have found a better archive of Ludis site (where the schematics I linked originated).
https://pcmhacking.net/ludis/1227749schematic.html
This archive contains the schematics for ecm's similar to the 8707. It's been years since I've dug into this so I would have to look at notes on another pc to be of more help.
At least you have more information, although it may be more distraction than help. The question is "What can replace this controller I am using." My hunch is that a later stock 8707 will be the correct replacement. The reason for all the additional work is to try and help devise tests to prove or disprove the 8707 will work.
Also, if you have read the calibration we may be able to compare the mask ID with a stock file from a later vehicle to see if it is the same. Same mask id indicates most likely they used the same ecm.
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Originally Posted by 1project2many
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