tight fitting header recommendation

Our 1962 fenderwells, we just capped the collector, then drilled a 2 1/2 inch ( 3" now)hole on the side of the collector the size exhaust pipe to be used, went sorta straight in and hung about 90* ish to the mufflers.
At strip just undid 3 bolts, put on extensions and threw the cap in the backseat till go home time .