Hello , We need parts for a local fire dept. Truck is a GMC HCV644 year 1952, with a 503 cid. inline 6 cyl engine. We need, a front CRANK PULLEY dual belt groove and 6 ROD BEARINGS std. We think rod bearings may be Fed. Mogul # 9860cpa-std. or GMC # 1157640. G... Login to read more.