Finally getting started now that it is warmer

Exhaust holes on the flanges are 1-7/8" x 1-1/4"

holy christ those are way to big! my ports on my race motor are only 1.45x1.15! and that with a .110 raise port! i have 1 5/8 tube headers which i think are to big even, even with big valves i think slants need 1 1/2" step headers...