Glenn, Many of these numbers may be casting numbers. The final P/N after machining is what is in the Parts Book. Some castings can be machined into more than one P/N. A piston casting, for instance, could be machined into several diameters. Or a crankshaft into automatic or standard trans versions. What kind of 57 engine is it? Dave Homstad 56 Dodge D500 --------------------------------------------------------------------- At 09:52 PM 1/11/99 +1300, you wrote: >Hi all! >Can somebody grab a parts book, and tell me what car/engine the >following parts came out of. My parts book for 55-58 DPCD contains not >one of these numbers, yet it is definitely a 57 engine.... >Crankshaft.......1826-723 >Connecting Rod...1618-699 >Timing Cover.....1676-241 >Rocker Arm.......1618-674 >Cylinder Head....1618-721-4 >Ta muchly. >Glenn. > > Dave |