This will probably sound strange but I was wondering if anyone knew of a company offering "underdrive" pulleys for the SC, not the lightweight kind but ones that are actually larger than the stock 3-1/8" pulley.
I am using an M90 for another car project and want to pull boost back a little bit because the motor's static CR is too high to use with 91 octane pump and the ~12PSI the M90 generates on an otherwise stock engine.
Hopefully there is a vendor out there that sells such a thing.
Something that just came to mind; anyone know if the pulley off a Pontiac GTP M90 will fit on the SC? I have read on here that it is a pressfit without provisions for a keyway but that could be machined in...the 6-rib would be fine as well.