Thanks for all your comments!
I have never heard of Imps ablaze following a collision. The petrol tank is up and away from the front suspension. Certainly it is not a common problem, at least.
I do want to compete in the car. Funds are holding me back at present. I want to enter a few sprints and hillclimbs later this year, though and perhaps the odd autosolo or two.
Some videos of me on track last summer at Teesside Autodrome.
I have plans to fit EFI soon, once I have taught myself how to fabricate an inlet/exhaust manifold. Mapped ignition too.
Paul