I can confirm what alanp has stated , bit too wide, I intend to stick some thick rubber sheet onto the tank to take up the slack.
Also if you intend to store the tank for a while fit the taps and fill it with paraffin or petrol otherwise it will probably rust inside, mine did despite being stored in a plastic box with lid.
I bought one of those kits from Frost Restoration and treated it, made a nice job of it and probably worth doing anyway.
PS anybody know where my money goes, can't seem to hold onto it.
All the best - Bill