Something isn’t quite right here ! I’m no expert – but this doesn’t look right. When the crank is at TDC, the piston is clear of the cylinder.
Here’s the page from the Pengwern book. Spot the deliberate mistake…
1 and 13/32 of an inch is actually 35mm (ish) – not 45 as is illustrated. Once that was sorted out, the engine now looks like this at TDC:
