what pistons to run with set up??a bit of help

IMO, honestly, you need to do some looking around and find a set of slugs that will make a 9.5-1 ratio at max with the head your going to use. You need to find out the cc amount of the head your going to use. Then, combine all of these numbers to find out what gasket to use.

While the KB-167 can be used for the street, the ratio it produces with a small chambered head will be high. In general terms, but not in stone, a street pump gas friendly ratio for a iron head is 9.5-1 and 1 point higher for aluminum. You can get away with more compression is the cam gets larger to bleed off compression.

If the cam gets larger, other considerations must be taken. Higher gear ratio, stall converter are the start.

There are a few unknowns to this whole thing that you are missing and the engine is only part of the deal.

While my answer of a bigger cam will allow the engine to run on a high compression ratio, it isn't exactly the best answer to the problem, there is truth to it. But it may not be what you want to do. The answer is correct to a degree. Lets find out what degree your in.

Tell me, what is the gear ratio, tire size, tranny's stall converter or 4 spd.
We have intended purpose all ready, it is a fun machine that runs on pump gas.