tophatyachts.com

Is their any drawings available to fit shaft and inboard into a mk2 tophat that hasnt had a inboard fitted only has provision at the moment for outboard

Don't even think about it. For the cost of dry stand time, drilling and glassing and fitting a shaft tube, through hull fittings and engine beds, prop, shaft, and motor plus electrics and fuel tank (I think that's about it), you'd be better off buying another Toppy with an inboard.
Cheers, RodM

I tend to agree with Rod, there are plenty of Top Hats out there that have inboards.

Would be cheaper to re-engine [if necessary, with a re-conditioned motor] one of them.

Plus the value of Top Hats is too low to justify the expense.