| The head isn't period correct and may not be legal. If you can use larger  
valves you should certainly be able to use any compression pistons you  want.
 
Bill
 
In a message dated 28/02/2008 8:12:14 P.M. Pacific Standard Time,  
james.f.juhas@snet.net writes:
I  vintage race my 1957 MGA.  A little more compression might be nice,  
and permissible as long as it's period correct.
But mostly,  assembling a back up engine with what I have available is my 
main goal,  and I don't want to give up any power relative to my current  
engine.
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