"Not that I'm management, but I have followed this topic carefully. The answer is "yes".
If a bike came stock with a front disk brake in 1984 it is a legal GP3 bike, which also makes it legal for GP-60.
Diane Piper is now a member of TEXAS VINTAGE RACING CLUB
"Hello Little Gene, Sorry it took a while to get back to you , anyway hope all has been going good for you and your family. I have been racing some vintage stuff and have really enjoyed it. I was wondering how your parents are doing and would like…"
"I remember Rabbit Run very well....My last race there was 1977 for the D20 race to qualify for the regional race, which was held at Red Bud to qualify for the 1977 Nat'l Am Championship at Lake Sugar Tree. Remember that David?????"