such a division of both design and development required the utmost in teamwork by F.F. Kishline, Chief Engineer, and his assistants, E.L. Monson and J.S. Voigt in Kenosha, and by R.H. Isbrandt, Chief Design Engineer, and W.S. Berry, Chief Mechanical Engineer, in Detroit." The engineering team was able to get the clean sheet V8 into production in less than 18 months due in part to being able to apply the research and development effots that were done by Kaiser-Frazer for engines that never reached production. One of AMC's engineers, David Potter, had worked on developing V8 engines for Kaiser-Frazer. American Motor's first V8 engine debuted having in 1956 with a version in 1957. Production of the 250 was discontinued with a new version replacing it in 1963. All these engines share common external dimensions, lightweight - about - forged crankshaft and rods, as well as most other parts. The stroke for all Gen-1 V8s is . Engine displacement was a factor of the bore: the has a bore, , and the a bore. A number indicating the bore size is cast on the top of the engine block's flywheel housing immediately behind the right bank cylinder head. The block features a deep skirt where the casting extends below the crankshaft centerline, forming a very rigid crankcase gallery. The oil system feeds a central gallery to the cam and crankshaft first from front to rear and then dividing at the front to feed the two lifter galleries from front to rear. From the rear of the two lifter galleries oil is then supplied up to the two rocker arm shafts which serve as galleries to lubricate the valvetrain. The fore and aft direction changes are designed to eliminate stale oil areas which tend to form sludge deposits. 250 American Motors' first V8 in-house engine, the 250, was used in AMC automobiles from 1956 through 1961. It was a modern OHV/pushrod engine design and made its debut in the Nash Ambassador and Hudson Hornet "Specials" of 1956. These cars had the top-of-the-line model trim, but were built on the shorter wheelbase (Statesman and Wasp) models (hence the "Special" name). The 250 uses solid lifters and came in two- and four-barrel carburetor varieties (4V only in Nash/Hudson "Specials"). The 250 V8 was optional in the 1957 Rambler. All 1958-60 V8 Ramblers were called "Rebels" and designated as a different series. It is easy