Height of sails foot above deck on Tiki 38?

[Allen Bosely]

How high above the deck are the bottom of the sails on the Tiki 38?

How much taller could the masts the be built taller to raise the sails above the deck without increasing the leverage of the sails and substantially lowering the stability?

I'm not looking to build a T38, but wondering about the height of the sails above the deck with approximately the T38 sail plan/size, beam and LOA.

I'm referring to the possibility of increasing the mast heights 6"-12" to gain a bit of more head clearance. 

 Cheers, Allen