1982 ?Powerslot?

[82Collectors]

How can I tell if my 1982 19? Mastercraft has a Powerslot transmission with the 1.5 to 1 ratio? Has the Ford 351 engine. I have the original book (3 ring binder) that came with the boat which has one page in it that talks about the Powerslot but looks more like an advertisement than part of the original book.

Thanks,
Andy