AMC V-8s

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 ====Bellhousing bolt pattern====
-The AMC Gen 1 V-8 has a unique bellhousing pattern. In 1955 AMC built Nash and Hudson models, and all the V8 models except the 1956 Nash/Hudson Specials used a Packard V-8.  The "Specials" were the shorter wheelbase/lighter weight Nash Statesman and Hornet Wasp two-door bodies with Ambassador/Hornet trim to make it easier on the 250/4V V-8, and to distinguish them from the Packard-powered big cars. AMC had a purchase agreement with Packard for V8s and auto transmissions in 1955-'56. Packard had made a "gentlemen's agreement" to buy parts from AMC but didn't, so AMC management, in frustration, started designing their own V8. AMC also discovered later that Packard was installing two head gaskets per side in the V8s they sold AMC, resulting in lower compression and less horsepower in the Packard-powered Hudson Hornets and Nash Ambassadors than the comparable Packard models.
+The AMC Gen 1 V-8 has a unique bellhousing pattern.
 The AMC Gen 2 290 cid V-8 appeared in late 1966 in the American, and across the board as a 290 or 343 cid engine in 1967. The Gen 2 engines use a different bolt pattern than the Gen 1. Pre-1972 inline sixes use a smaller diameter bellhousing than the Gen 2/3 V8s) with a bolt pattern shared only with the small 1950-'54 Nash L-head sixes. All 1972 and later AMC inline sixes and V-8s use the same Gen 2/3 V8 bellhousing bolt pattern.

Revision as of 22:41, 14 February 2015