Buick Big Blocks and post-1963 Small Block V8s.Post-1965 Buick/ Oldsmobile/ Pontiac RWD V8s.1967 through 2004 Rover V-8 based on the GM 215īuick, Oldsmobile, Pontiac (BOP) V8 pattern BOP V8 Pattern.1961 through 1963 Buick/ Oldsmobile/ Pontiac 215 Aluminum V-8.Pre 1964 Buick and Rover V-8 Round pattern These engines can be fitted in rear wheel drive vehicles with the right bellhousing and are used in hot rods, kit cars, sand rails and late model engine swaps.Ītlas family engines use a unique bellhousing pattern which no other GM motors share. Being nearly identical, it too has the distinctive odd-sided hexagonal shape. Nearly identical to the GM small corporate/metric pattern, except that the starter is located between the cylinder banks, and the lower right bolt hole is moved outward by roughly one inch. AMC/ Chrysler 2.5L I4 found in Jeep Cherokee, Comanche, Wagoneer, CJ and Wrangler and Dodge Dakota.A rear wheel drive bellhousing is displayed at right, and the integrated front wheel drive bellhousing is displayed at the lower right (in this case, as a part of the GM 6T70 Transmission).
The 2.2l S10/Sonoma had the starter located in the same position as front wheel drive cars.
Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations. This pattern has a distinctive odd-sided hexagonal shape. GM metric pattern Also called the GM small corporate pattern and the S10 pattern These modifications include an additional bolt hole at the top of the pattern, and attachment points for cast oil pans to lower bellhousing extensions, to reduce NVH. Generation III V8s with modifications.Chevrolet 153 Inline 4 ( Chevy II, pre- Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor).Chevrolet Turbo-Thrift engine (post-1962).Do not confuse with later AMC 2.5 L engine that uses GM small corporate pattern ( see below). These use a Chrysler custom Torqueflite 904 automatic transmission with an integral Chevrolet bellhousing. GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations).This was so named because it began with Chevrolet's V8 engines. Though General Motors has manufactured many different engines, it has kept variance in the bell housing patterns to a relative minimum. The following is a list of GM bellhousing patterns.
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