Quote:
Originally Posted by rx dealer
The 231 is a Buick engine and it's a 90 degree V6. The 2.8 in the S-10 is a 60 degree V-6 and it's completely differrent.
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Later in the development of the 3.8 L Buick they changed the Bellhousing style to the GM small bell configuration . The Buick V-6 used to have the BOP bell , but when that engine was re-done to the Buick 3800 the bell was changed to the GM small bell , so the block was different and was used even in RWD vehicles like the 4th gen Firebirds and Camaros with that small bell . My street car is a 1996 Firebird with a 3800 and it has a 4L60e with that small bellhousing . The small bell was used on the Chevy 2.8 , 3.1 , and 3.4 L engines .