Recently rebuilt 3 rochester carbs from a 1960 Impala and bought a new Edelbrock intake and sent the carbs out to be painted red. Going on my sbc this spring. I jeted the primaries at .55 and the secondaries at .56. These rochester carbs are pretty easy to rebuild. I have 12 - 97's, 1- 48 , 6 rochester and 1-94. Now all I need is a good flathead to put the strombergs on.