The casting number is 3836160 and has only 1- 3/8" threaded outlet. 1955-58 Chevrolet Trucks 235ci 3.8L I6 engines. Up for sale is a professionally rebuilt water pump for the following applications.
1937-40 Chevrolet Pass car Truck 216 235 new water pump Gasket kit 598309
1937-40 Chevrolet Pass car Truck 216 235 I6 new water pump rebuild kit 598309
1941-52 Chevrolet Pass Truck with 1955-62 235 engine new water pump KIT 4-1/8"
1937-40 Chevrolet Pass car, Truck 216ci 235ci I6 rebuilt water pump 598309 5/8"
1955-62 Chevrolet Pass & 1955-62 Trucks 235ci I6 water pump rebuild kit 3736567
1973-87 Chevrolet K10 K20 LS Swap Radiator Hoses [1020UL] Dual Pass, Truck 6.0