Are Doug's headers worth it over my Summit headers?

I must be one of the luckiest guys around, I purchased my Black Jack Alumicoat headers in 1983, they fit fine never hit ANYTHING never bottomed out. If i needed to buy NEW headers yes I would go with TTI's or Dougs, but untill then I will keep my blackjacks I paid $179.99for them in 1983,
On another note would you pay the extra for the coating on the INSIDE of the header??