'61 Canadian Pontiac Strato-Chief 2 Door Post w/ factory Chevy 409 4 Spd. .
The Canadian Ponchos had Chevy chassis/drivetrain so w/ a bit o' wangling could've been built w/ any available Chevy combo. .
Although possible mid year, I don't think any were built but this has always been the one for me w/ it's Chevy Biscayne brother in second place. .
Either would be the Fleetmaster-Utility version w/ 'everything delete'....dog-dish caps of course!

~ Pete