Item # BIG-31130 FLT on the summit web site. ceramic coated with 1 3/4 primary. Probably not coated inside but for 229.00 not a bad price. Anybody have them?

Yup, I got flow techs, but I don't think they were ceramic coated, but I can't remember. They are pretty good, have a good build quality, and fit well. I needed to jack up the driver side of the motor and unbolt the steering shaft, but other than that they fit. The price was the major reason that I got them, and they are worth it, IMO.
Chris

tried using a set on my 67 a couple of years ago
it was a big block and they did not fit at all
got another set and they also did not fit
then bought a set of hedman headers and they slid right in without any problems

Have a set on my 69 big block and they are great. Look sharp, work great, really worth it.

Ditto what Tom's 68 said. My '66 with a 396 had serious clearance issues with the frame crossmember. I also went with Hedman's (ceramic coated), and they fit beautifully. By the way, the Flow Techs were coated on the inside, at least as far as you could easily see. Fit, on the other hand, was a "no way" proposition.