1985 Southwind P30 Header options

Hi I have a 82 PA P30 454 that had the passenger side cracked manifold when I bought it and took it in to a hotrod shop(also works on MH's)and he replaced it with a new one perfect for a year and then it started to leak again so I took it back and they replaced the gasket with one that has a metal ring around the center of the gasket N/C, they tell me 454's are know for this problem. Anyhow she sure is quite now. They tried to sell me headers the first time but I passed knowing that is still a option.I also had them redo the exhaust in stainless from the mufflers back to behind the rear wheels instead of infront of the tires. Sounds pretty nice @ the tailpipes and I can hardly hear the motor with the doghouse on. I plan on keeping her she only has now 49,000 miles and 260 on the gennie. Heck its not even broken in yet.