crank shaft

Can anybody tell me if a 350 oil pan is the same as a 455? Are they the same for a 1970 cutlass?
Mike

Smitty275

Basically they are the same. 455 pans had a "ledge" in them that extended over the sump. They will interchange.

crank shaft

What was the ledge used for?

Smitty275

Can only surmise it was an attempt at windage control.

crank shaft

Ok, thank you so much for the info!

joe_padavano

They will interchange, but they are not the same. BBO oil pans have a pair of "bump-outs" (for lack of a better term) at the front of the sump where it joins the main pan. I can only surmise that these were to allow oil to flow back to the sump more easily past the larger counterbalance weights and crank throws on the BBO crank.

SBO pan:



BBO pan:

crank shaft

Thanks Joe, I just ordered the correct one from fusic today, You saved my butt again! I owe ya another one! Mike