That would indeed make it the best NA 1.8 in the country and maybe the best SM. Can't wait to see you on the podium with it. With those numbers there is absolutely no reason to reduce the weight to 2375. Preliminary speaking, what in the world more do you want or think you need to get that car closer to "identical spec"? More weight?
"Identical spec" == everyone running as close to identical hardware as possible minus aerodynamic differences.
Permit the 90-93 to update to all NB1 running gear (subframes, rear uprights, engine, differential, brakes, dash) + 38mm plate.
Permit the 94-97 to update to all NB1 running gear (subframes, rear uprights, engine) + 38mm plate.
To the best of my knowledge, there's not a performance difference in the 1.8 blocks to require a full engine swap so allowing the 94-97 to merely drop on a NB1 head + manifolds in lieu of the full engine would be the only variation.
It essentially is moving things in that way with the suggestion of NA8 w/o plate and the WDYT posted a month or so ago about the subframes/uprights.