whats the stock gap on TR6s ? what should i gap them at with my combo?

I got close to 12:1 C/R
put the TR6s in without touching the gap (no clue what they are stock)
i have a crange ign box ... and will be spraying 100 to 150

what should i gap the plugs to ?

NGK TR-6 are .038 Stock......someone correct me if I am wrong.