1.B.1 CLASS CHANGE:
A class change is defined as an engine displacement change, a change from Gas to Fuel, Blown to Unblown or a body change such as Gas Coupe to Altered. A class change will require a complete inspection of the vehicle, issuance of a new number by the Registrar, the completion of a Class Change Form, and the payment of additional entry fees.
Switching from gas to fuel is a class change. You have done this before so I don't understand the question. It is almost like saying "I think I can go 240 MPH, how about you guys mailing me my trophy".
New class = new qualifying pass.
DW
DW