Some are still easy to find, some near impossible, and some interchange with brand X's. EASY TO FIND: Cam bearings, valves, gasket sets (OEM & repro), timing chain & gear set, repro & special order pistons, water pump, distributor, & ignition tune up parts. NEAR IMPOSSIBLE: Main bearings, rod bearings, rod bushings, OEM pistons. INTERCHANGES: Early style GM 350 rings fit the 352 Packard. Mid fifties Chrysler 330 & 48-51 Cadilac 331 rings fit the 320. Ford truck 370 CID pistons can fit the 352 (machine shop mods & major rebalancing required). 48-54 Packard straight 8 rod bearings fit 320/352/374 (after mods with a file & belt sander). Perkins diesel engine rod bearings also fit (simple machine shop mods required). 1980-90 307 CID Olds V8 main bearings #1 thru 4 fit (after mods with a file). Early Chrysler 318 lifters fit. ----------------------july 2002 ------ Packard 352" V8 Sealed Power Michigan Engine Clevite TRW Piston 1849P Rod Brgs 2010SB 7010CAP CB474M CB474 Main Brgs 932M 832P MS190P MS1969P Cam Brgs 1147M N/A SH293S Valve keepers VK-138 Valves VE-1191, VI-1238 Tappets HT-879 Push Rods RP-3072