i started my 1942 l.c. last month after 30 years of storage, i first changed the oil and filter, and added 10-40 oil and a 12oz. bottle of zddp, plus a bottle of marvel mystery oil to quiet a noisy lifter i remembered from the last time it ran. i restarted it about once a week last month with no problems, and it was showing about 40# of oil pressure, yesterday i restarted again and the gauge showed 75# oil pressure. i immediately shut it down, and thinking it must be the gauge. i replaced the old stewart warner wings gauge, with a house brand gauge from the local parts store and it also showed 75# oil pressure. anyone got any ideas what the problem might be ??