THX, BECAUSE THE CAR CAME W/ WHAT I WAS TOLD WERE 440-1 HEADERS (CUSTOM MADE TO WRAP AROUND CAGE ECT.) JUST WANTED TO MAKE SURE THEY WOULD WORK W/ MY PROCOMP HEADS (ENGINE IS AT MACHINE SHOP SO I CAN NOT TEST FIT THEM - I JUST MOCKED THEM UP ON STOCK HEADS AND 440 BLOCK) - CUSTOM HEADERS LIKE THE THESE ARE HIGH DOLLAR AND THAT WILL SAVE ON SOME $$$.