Need help with this vacuum reading

Ok, so can I in theory run what I am running (a stock convertor) with what I have until I figure out the gears and such that I want to go with without hurting anything?

Sorry guys....I am really a newbie at this stuff....learning as I go.

I probably picked the hardest combination I could have picked as far as figuring our what works --- an "unknown" engine that has been tweaked and massage, with no way of knowing how other than dismantling, and a car that came with "high way" gears....LOL

Thanks for bearing with me.