This is what I was planning for the head, any advice especially around the combustion chamber as this area I think is more down to experience and knowledge of the engine rather than flow bench measurements (correct me if I'm wrong):
Intake port entry enlargement, surface finishing and port matching.
Smooth the intake short side radii, valve guides and valve pockets.
Smooth the exhaust short side radii, valve guides and bowls.
Exhaust port and bowl polishing.
Combustion chamber polishing.
Intake manifold port matching.
Shorten valve guides if not already done?
Larger valves (46 and 38.5) with new hardened seats.
Unshroud the valves. I was thinking of getting this machined by my machinist when doing the new seats and this is one area of the head I'm very weary of messing with as it must be correctly done. How much clearance is recommended around the valves? Is there a maximum volume for the combustion chamber as I want to limit loosing too much low rpm power? And finally is there a ideal combustion chamber shape that is best or is it okay to just match the gasket next to the valves?
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