TTI Shorties on 340 - 67 Cuda...Anyone running them?

I see the TTIs have the option for the inside ceramic coating as well. I didn't see that option for the Dougs. Can anyone tell me if there is a better fit between the two brands?

Thanks again,

i've never used dougs but have never read anything bad about them. the biggest difference between the two is that tti is a step header and dougs is not.