The problem with "next largest size" is I don't know if they will fit the pressure plate. Clutch cover -to- flywheel bolts are special. They have an enlarged area, a special "shoulder" which snugs them so to say, into the cover holes and into the tops of the flywheel holes. Do you REALLY want to tap that out to 7/16 and then maybe have to ream one cover hole out, thus creating a "special" clutch cover?
