452 heads on a 1965 Wedge ?

i used them on a stock 9 to 1 65 383 , cam'd and twin inline fours and full length tube headers . it ran fine and with 2.76 rear gears it would pull to 6k at 120 mph in second gear of the 727 and flat get it with the nose up when i pulled into drive . this was in my 65 custom 880 rag with 130k miles on it .