Re: KVA Chassis
I am sure with a bit of juggling you could get a Tornado body to fit a KVA chassis but you would be better of buying a body from Chris Melia which is closer to a KVA.
With regards to a workshop manual, there never was one as KVA only supplied chassis and body kits, the rest you found yourself. There is a lot of ingenuity required in building something like this but if you feel confident, then go for it.
If you haven't already, join the clubs and pick the brains of those who have already done it.