It's a "stained" purple or blue Miller Dog.
1987 (or even 1988) is the year... the shorts on the kid watching... short lengths from clothes manufactures like Gotcha, Quicksilver, Billabong, Jimmy'Z, the list goes on and started to get much longer in 1986... so by the time these new fashion trends from Southern California got to your neck of the woods it could have easily been a year or two later. That, plus... Schmitt Stix went absolutely fucking nuts with stained decks in 1987.
You removed (sanded off?) the upper portion of Dogs tail (on the nose of the deck) but there is a bit of still exposed original graphic (circled in red) under all those stickers. That's part of the dogs ear. AND, near/under the 'A' in the "abolish" sticker the front paw of the dog can be seen.
I, 100% guarantee this is a Miller Dog.