'
First picture is OP link of 01/75 Chevy Action Magazine cover w/ modified '71? 'Vette Roadster w/ Hdtop.
2'nd pic a '69? Motion Coupe inside Lance Hill's Racing Engines Toronto shop back in the day.
Not sure what year Lance's pic is from but this or other Motion 'Vettes he had around could be what you're remembering?
Otherwise, Bob MacDonald Chevy Halifax was Motion connected also wasn't there a Motion 'Vette somewhere out Kingston way?
~ Pete
.