A quick note on the importance of balancing.
When I rebuilt my most recent MGA, I took the FW and PP to a machine shop to be surfaced and balanced. Flywheel first, it needed a very small hole to bring it true. Then, adding the PP required a 20 gram weight to be added proving that at least that mfgr. does NOT balance their pressure plates.
20 grams on a 4 banger would have been felt at just the right rpm range.