Pre 3B wing tanks
No pre-3B wing tanks...?
Well, I find that hard to believe since Van's RV-3 spar mod instructions CN2 for the pre 3B wing explicitly mention how to do it with wing tanks vs. fuselage tank. Why would they mention wing tanks if the pre-3B didn't have (except by builder customization) wing tanks?
Definitely finding this project difficult. No period plans, build instructions, and the guys at Van's support joined the company decades after the 3. A real lack of build photos online for any of these early planes. So you look at something and say, boy is that weird. But trying to figure out if it is weird and to plans vs. weird because the builder went off plans is a struggle.