Finetuning questions - do I need a high-stall torque converter ?

CallMeAl said

Heads are from a 1970 318 - compression 10:1
Fully ported with 1.88" Inlet valves and 1.5" Exhaust valves.
Pistons are flat top.

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Is the compression ratio from an advertised value or computed form actual measurements?

Are the pistons at zero deck or below deck? If below deck, how much?