Wayne, yes that Graphic is pre-Anniversary. I bought two Speed Graphics off Ebay last year being sold as a package to build one good camera out of parts, what the seller neglected to say was that the two models were so different that no parts were interchangeable, the other was a late Speed Graphic minus its shutter. The cameras looked terrible and I thought I'd made a huge mistake, luckily not very costly. Both with not very much effort, and a couple of parts, both cameras are almost fully restored.
The Wide angle Graphic appears to have been a special, it allows rise with a lens of 90mm or shorter, other US companies/workshops took part made Graphics and converted them for specialist use, one notable example was for Police ID cameras. When I stripped the body there was no trace at all of the screw holes etc which would have been there if it had been a later conversion.
The bed is fixed and doesn't fold, to improve rigidity and also give some strength the camera has an additional aluminium base plate. Without this plate the bed would be vulnerable as it is only screwed to the base of the camera internally, contrary to many reports these Graphic bodies are only made of some kind of box wood.
I haven't seen another converted Graphic but I did see an MPP wide-angle conversion about 18 months ago, this had been factory modified in the 1960's for a photographer who specialised in architectural work and had all the top of the body cut away to allow for rise with a wide-angle lens.
I think if I were to convert a Graphic from scratch like Jim I'd much rather have the later Speed/Crown front standard with it's shift & tilt which I'd reverse to allow front tilt, I've tried this on my main Crown Graphic but you can't fold the camera up when used like this, however if the bed was fixed then it would be far more appropriate.
Ian