Can someone tell me what I have for application, the flange bolt pattern is: outermost holes center to center are 19 7/8", the outer port is 3 3/16" center to center and the inner ports center to center are 5 5/8" the tubes are 1 7/8" and 3 1/2" collector. Want to make sure they are B.B. Mopar and what they fit.