Wanted original oil pan bolts head marking is 23 with three slashes, recessed head, captive washer is .62 wide and .055 thick, bolt has 1/2 in head, thread size is 5/16-18, these came on 383/440 with windage trays, need 20 but what do you have...these bolts have a nylon pellet..and differ from a timing cover bolt as the captive washer is only .055 thick, whereas a timing cover bolt washer is .08...thx Keith ,318-393-1502
