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My 440 makes about 90# of oil press at 1000 RPM cold and around 70# at 2000 while hot. Is this abnormal or anything I should try and rectify?

smokey yunick put it best . you need 10 lbs of oil pressure per 1,000 rpm. if your engine will see 9,000 rpms , then it will benefit from 90 lbs of oil pressure . with the tight clearance in todays engines, coupled with the advancement of synthetic oils, 15-20 lbs hot @ idol with 65 lbs maximum is the standard for most street strip engines. many older engines with less quality machine tolerances will need the heavy weight oils to keep pressures up when hot. remember this... an engine which is on oil by-pass is not filtering the oil...get your pressure corrected and you will solve all issues.