Good deal PeterC.
Nothing puts a smile on my face as seeing another IC engine intended woodgasifier and gasifier operator being put on the face of the planet in real metal.
For your woodgas engine tuning future I highly recommend Mr Vesa's Mikonnen's book listed in the Resources -> then Books section here.
He can give you a launching point background in NA and forced induction, cylinder head/valves, camshafts, timing curves - mechanical and electronically controlled, mechanical and EFI carburetion/mixers, boosted CR's, rear diff and auto tranny mods all based on hands on experience of doing it with small block V-8 Ford/Mercury/Lincoln and GM 350-400 CID engines.
Ha! Ha! Shows measured performance and pictured munched piston/rods to prove it.