Well if you want to be technical about it, mine isnt stock either, as the plans did call for a Veco .19, and I'm using a ops .21
For the benefit of our readers over here, so we can bring everyone reading this up to date. To the best of my knowledge with a cowl change & a nose job, the Dumas Pay N Pak hulls can be made to look like any of these.....Current sport 20-40 rules dont require the boats to be exactlly to scale, but by using the Paks hull as a generic platform to start with, heres some ideas you can play with....
'72 Notre Dame U-7
'73 Pay N pak U-25
'74 Miss U.S. U-2
'74 U-95 Turbine
'75 U-76 Valvoline
'75 U-74 Weisfields
'75 U-3 Tri-cities
'76 U-12 Budweiser > my choice!
'77 U-6 Miss Madison
'78 U-31 Circus Circus
'79 U-52 Design 360
'80 U-2 Squire Shop
'81 U-8 Oberto
'83 U-7 American Speedy Printing