Your pistons will be the determining factor for your final cr, combined with your chamber cc's. You need to know what your emissions standard is in TX, up here it's dependant upon the year of the car which test is required, i.e. no test for '67 and older cars, tail pipe sniff only and full blown testing to the point it has to have the original air cleaner installed or you have to go to the referee station. Fortunately we can get a seasonal waiver and have no test requirements if it's not driven during the winter months for $18.00.
Many of the parts you buy can be CARB certified but there are so many variables that can throw emissions through the roof it could make passing any test impossible if the state requirement is tough.