I just rebuilt my 83 Bronco's 302 v-8. I had re-ground the crank,bored it out .030,changed all the replacable engine parts. Anyway, now the oil pressure when cold is 60 psi at an Idle, but after it,s warmed up , its down to 20 PSI, which bothers me. Isnt it supposed to be 40 PSI at an Idle,when warmed-up? Before the rebuild it didnt have a oil pressure gauge that reads accuratly,like the aftermarket Oil pressure gauge I just put in it.The factory oil pressure gauge,that its always had,in the dash, just displays the normal operating range, and below normal, and above normal.No PSI numbers are on that gauge. All the time Ive driven the rig before the rebuild,I assumed the oil pressure was 40PSI at an Idle,when that gauge was showing and still shows a normal reading.I double checked the pressure with an extra gauge, it reads 20 PSI @ idle also. Is this typical of 302 small block fords? Im running 10w40 oil, ( 6 qts,+ new filter of course).It always has between 60 to 80 PSI when cruising,No Leaks, so its just the Idle Im concerned about.Do you think this is normal??

I have rebuilt a few 302's using a stock oil pump should expect minumum of 20 prefered 30psi hot and at idle and about 45psi running down the road myself I stay away from Melling oil pumps standard and high volume they have a tendancy to seize up I normaly use Mildon oil pumps and check all clearances before assembly