suregrip unit..?

He used to work for the local dodge dealership as a mech, about 20 some odd years, retired in the mid 80`s, he used to buy all the old trade ins, anything performance mined, he has lots of pics of hemi runners, superbees, GTS that he aquired over the years. some local strip action of the cars he had bought, now he`s just cleaning out whats left. The suregrip is a clutch unit, he had said it was for a 489 case, its all wrapped in heavy plastic bag, its a done deal today.