@speedrcr: aluminium honeycomb indeed is prone to corrosion, but as F1 uses it I thought perhaps it's a good idea to make it stronger more impact resistance.
I'm still doubting what to do just buy a project race car or build one myself. Plans for the home-build car have changed though, if I would build something perhaps I will build a prototype style car, and instead of moulding try monocoque structure with carbon panels instead of the usual aluminium however I would have to do some calculating if that's going to work. Reason for this change is that I would be able to compete in a lot more classes; britcar, interserie, sportscar challenange austria. Other problem is engine choice, I would really like a Hart 420R 4 cylinder as they are powerful and cheap or the F1 415T engine which costs about the same to run. However I came across a coworth DFX engine lately for 15k euros, rebuild! That is surely the cheapest way to have 700HP, although I'm a bit scared for the rebuild costs. Beside I have no idea I could handle 700HP
. It all seems a bit ambitious, and it is but that's how I am, sadly. To keep costs down I will try to use F3000 uprights wishbones etc, which are available.
Other idea was to keep it simple and buy a 1980 F2 car which are still cheap as there isn't a special series for it yet. Would be a very good investment as you bear in mind that 70s F2 cars now cost 30k+. I have also been looking at something even faster an f1 turbo car, seems mad perhaps but they're incredibly cheap with the right engine, and I mean a hart 4 cylinder turbo with that, I know of a few for sale for 30k pounds, still a damn lot of money but think of the history and see it as an investment it would make sense although I could not run it a lot which would be sad even though these Hart 415 T engines are very cheap to maintain.
Please help I have no idea what to do!