I can't speak for all of NY/NJ, but, in 1980, the two top places that I was going to, in my area, were using either Grande or a Grande clone. I can sort of picture white-ish poorly melted cheese at some of the lesser pizzerias- cheese that could easily be Polly-O or a Polly-O analog, so perhaps Grande didn't have the market penetration then as it does now, but I think it was still pretty popular.