Spitfire eh? Bit too modern for me! Now if you said a 30's Sloper or 40's Panther...
May already have the next project staring at me in the face. My '77 CB750F2's frame is corroded in places and it's already been welded once. It's not a straightforward job to replace it as I significantly modded it when I built the bike about four years ago, so I'm thinking about what to do with it. 20 years ago I had a CB750 hardtail which was sooo much fun - in a straight line at least. I'm sorely tempted, but as said machine is off the road at the moment with carb holder disease I've got a bit of time to think about it!