I have restored a 1949 chev. 1-ton truck with a stock 216. The things iv'e changed are .20 bore with aluminum pistons. I rebuilt the oil pump, and new bearings in the engine. I have 30w oil in it, When it's cold I have 30 lbs. pressure at about 1500 rpm I took it out for it's maiden run today And when I'm driving at normal speeds It is only showing about 5 to 10 lbs. of pressure. Is this normal? Thanks Guys.
