I checked and my stock flywheel says FS01 on it, and the blocks with the studs where the clutch bolts on don't seem as tall as the BP flywheel.
Today I bled the clutch in 1574, the pedal is slow to retract and has to be pumped up to get adequate pressure. It helped some but it is still too soft. Going to try to vacuum bleed it and then replace the slave and master if it still is soft. Need to go to the JY to find a 'controller' for the rear defroster, whatever is mounted to the stock sub box bracket that is missing in #1574. I purchased a non-cracked Callaway manifold that I plan to install in the car, then I may replace the AC compressor and the car will be ready to sell. I bought a clothes steamer at goodwill for $7 to remove the purple window tint on the rear. Side windows came off easily in one piece but the rear window has given me trouble. Going to try ammonia to eat the adhesive and get the bottom layer of tint off without using a scraper.