Worth it to put headers on a 318?

on my 70 duster back 12/13 yrs ago I had a 318 bored 30 with trw pistons general kinieck (speeled wrong lol) cam 454 lift stock rockers,performer intake 750 dble pumper carb. cheap flow tech headers 430 gear on street tire and would wipe the floor with a stock mustang... oh h pipe and 2.5 into flowmaster mufflers which I still have lol... the thing with cheap headers is to cut out the centers so the tubes are single and not all welded together and then I don't use gaskets either ..I use black hi temp permatec never a problem ...I buy it buy the tube like chalkin and use a chalkin gun lol...when you cut the centers out that lets each pipe move on its own and not fight against the other that may be welded wrong warped or whatever...just my 2cent lol