Yup...remember them well. We saw far more in the Olds Cutlass and 88`s, and a lot of Chevy vans, but they were around. Had problems keeping the heads on them. It was essentially a beefed up Olds 350 block and there just wasn`t enough strength in the block to keep the heads fastened down. The blocks had the GM corporate bell housing bolt pattern (non Chevy pattern), but if a guy was lucky, there were many trannys that had the dual bolt pattern and the swap to a gasser motor of any GM make was an easy no brainer.