g power block compression

What cam? Duration affects combustion chamber pressure.
Which pistons in the PB?
Is the flat head pinned? By the time a flat head is beefed up. May as well have purchased a HD aftermarket head which also has larger/better ports.
What gasoline do you figure on using?
Mag or distributer with advance?
 
iam going to run the blackburn saturday night special cam..its the hottest cam out there for a 2 cyl..roller rockers...hot mag..flathd..it dont need to be pinned comp wont be that high..
 
With that much duration and overlap. There won"t be high cylinder pressure on the compression stroke.
Still suspect a head gasket leak is in your tractor"s future.
 

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