I am not a lotus expert but I will describe as best I can what I know about the engine.
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Valves are 1.625 inlet and 1.4 exhaust.
Cams are as close as I can measure close to full race with10.60 lift duration I cant measure and are fully polished.
Head is 4.640 thick .
Block is 120e6015-t4 also stamped by builder with 120e29953.
It is fitted with 83.25 hepolite racing high compression pistons .
Crank is a lotus Steel crank supplied by Bob Yarwood,standard journal sizes.4 bolt with lightened flywheel for ap clutch .
Rods according to Bob are early Cosworth and have been sized by Lockside.Standard length .
Carbs are 40 DCOE if you want larger the engine can be sold less carbs.