I'd be tempted to go with Alan's suggestion and build the 33 with a mini-motor. It is a 1.5 litre car after all!
You could then open up the rest of the cockpit and get a lot more Jim in
It wouldn't make the best use of that lovely rear bracket though so maybe a new shell for this one and a new chassis for the 33 as you were (sort of) thinking
You could then open up the rest of the cockpit and get a lot more Jim in

It wouldn't make the best use of that lovely rear bracket though so maybe a new shell for this one and a new chassis for the 33 as you were (sort of) thinking
