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Both the Chevy and BOPC ( Buick, Olds, Pontiac, Caddy ) transmissions were 6 bolt housings for most of their production life. The original Chevy housing was 7 bolt and that's why their trans housings have a peak. In fact, most Chevy blocks were manufactured with the top center bolt hole drilled and tapped long after Chevy had changed to a 6 bolt housing.

So how do you tell the difference between the common as dirt Chevy pattern and the far more desirable ( to us ) BOPC housing? 1. Well, the first and most commonly stated visual reference is the Chevy peak versus the BOPC saddle at the top of the bell housing.

Here's a picture of the Chevy ( L ) and BOPC ( R ) pattern bells:

Carpet installation

1. Remove the seats form the car by unbolting them from the floor and lifting carefully out the door. If there are electrical connections to the seats, detach them before removing the seats.
2. Remove the seat belts that are bolted through the carpet.
3. Remove the sill plates from the door openings
4. Remove the console. There may be some hidden screws in the bottom of the storage compartment, as well as other fasteners in other areas. Look carefully, so you do not break anything. Detach any wires.
5. Lift out old carpet. You may have to ...