Petrol Tank and Boot area

[Deanno]

The other night i went to see my mates robin hood and had a spin well what a thrill i'm deffinately going to be building one now A roadster not a robin hood.

anyway more to the point one issue that he raised to me was the size of petrol tank he had fitted, i would like to know what is the biggest size tank able to be fitted and also above his tank he had a peice of nicley trimmed Plywood which he used for an extinguisher (as his twin webbers like to light up some times) and generally use it as a small boot with a leather cover buttoned on to it.

what do you think about the boot idea and size of tank?

Many Thanks
Dean