I'd go with a nut and bolt rebuild too, right back to standard aside from a few select Spoon bits. Brakes, suspension, diff and some engine bits. Liking the idea of a short stroke 1800cc too. 85 x 77mm with 10,000rpm would be good fun! I guess the Spoon clocks would have to accompany that.
A nicely retrimmed dash and door cards too, in alcantara with red stitching, and same on the rim of a brand new standard Momo wheel. Brand new Recaros too, but probably a more modern version suitable for the larger gentleman...