The factory pressure plate bolts are a whopping 5/16`s, not 3/8`s. I would forget about any "hardware store" style of bolts, and get actual pressure plate bolts, which are shouldered to locate the P.plate correctly. Mr. Gasket or ARP should be cheap and easy to find.
428 powered Fairmont drag car, Best ET:10.03@132.11MPH, best 60 ft: 1.29
59 Meteor 2 dr. sedan 332, Ford O Matic
74 F350 ramp truck 390 4speed