OK my vintage Sherwood double post manifold has arrived, and I assembled it to check centre-to-centre spacing... which depending where I measure it is 203mm to 204mm or 8 inches.
Plan on twin 9L or 10.5L steel Fabers (178mm or 7" dia) as the shorter tanks should fit well at the required DH lower position on a VDH plate.
Alternatively twin 72 cu ft steels which I think are 6.9" or 175mm dia so vintage bands should fit but centreline spacing would be different.
Trouble is most modern twin isolator manifolds are on 215mm/8.5" centres and accordingly tank bands are made to these dimensions
Anyone know of a source or a custom band maker who could make up some 7" bands on 8" centres?