Another piston option for the 273.

Ive been doing a bit more number crunching.
With the 3.58 crank and 6.123 rod holding the speedway racing piston.
The piston will actually be 0.040th or 1mm below the deck.
To gain a zero deck its just a .040 thou cut.
this will give me a 9:1 comp with the 68cc heads i have,
63cc heads will give me 9.8