After much research and digging on these forums, and trying to translate what works and what doesn't, I finally came up with something. Obviously a modified fogg style but heck, why not go with what you know, huh?
Overall dimensions are 30" long by 10" wide by 18" high. I have one (yes one) side arm burner entering at the front center, two inches of 8lb kaowool all around and coated with satanite, and a two inch black pipe running front to back that the blade goes into for heating. Venting will be through the roof with moveable panels to adjust vent size as needed.
My test run this morning gave me a little over 20" of reasonably even heat at critical temperature (1550 degrees)with burner running at 3psi at tank. I imagine things would get very hot at 10 or 15 psi. I'm even more suprised that one burner could create the even heat over this long distance and probalby more with a longer forge body. It could get interesting with two burners mounted both ends. Next time.
Anyway, I learned lots visiting here, Don's sight, Larry Zoeler's, Ron Reil's, etc.. and thought I'd share.
Dan