Those are of the small combustion chamber. I have heard that the Packard's had a really good combustion chamber design.
What would you recommend for piston to head clearance on modern OHV engines I have heard 35-40 thousandths does the same hold true in a boosted flathead?
I will be using a stock reground cam as to the best of my knowledge no cam blanks are available so big lift will not be something that will be happening. What would you suggest the valve to combustion chamber clearance be? I can mill the head or go thicker on the gasket if need be. On that note relieve the block or no? I have heard pros and cons to both but seems like you have had a turbo flathead before so which did you prefer.
firing order is 1-6-2-5-8-3-7-4
I will get some pictures of the outside of my spare engine I have the intake and exhaust manifolds off it right now but it has 8 exhaust ports and 4 intakes and they are not very large and sadly these engines don't have a lot of meat in them for extensive porting.
