Those corner brackets tell me it might be a lonestar but the brackets are missing the star. The front bracket on the bow looks like a starcraft. only thing for sure the boat is not an alumacraft. Cool old boat and much easier to restore than a fiberglass boat.
The boat I am buying is owned by a friend I have ridden in the boat it is in very good condition, I typically do my own service and repair so I am not held hostage by a dealer. There is no way I am buying a new boat that will do nothing but depreciate, I am not out to impress anybody on the water.
I would just get 5 gallons of mixed gas fill the 2 2 gallon cans and store the rest, not like you won't burn it up next weekend. Lot easier than doing the math.