At long last I got around to taking some pictures of the final product. I figured I should show everyone what their help and advice helped create!
First I had the forge sandblasted and I coated the table surface with POR-15. Then I visited the junkyard and found a cast iron brake drum to line my firebox, as it was kind of worn. I used fireclay and the recipes for use on here to fill the gap between the drum and forge table. The new fire grate is a cast ebay special, but the replacement tuyere I made from a hubless cast iron sanitary tee fitting with a welded flange made from a piece of flattened angle iron. I also attached an ash cleanout door per the plans I saw on here.
I tore down the gearbox, cleaned it, rebuilt it, painted it and made a new maple handle for it. Also used body filler to smooth the inside surfaces of the fan housing before repainting. Then I had a piece of exhaust tubing bent to make a draft tube, with tin bands cut from leftover flashing, exhaust sealant, and hose clamps tying the blower and tuyere together.
Finally, I cut and fit some firebrick to protect the table surface and to allow me to manipulate the work surface a little better.
I think she turned out pretty well all in all. Right now it's in an old shed, so I have to drag it in and out to use, but when I build my shop I'm going to make a nice spot with a dedicated hood and chimney.
Thanks for the help all, just wanted to share some pics of my freshly restored toy... As if I needed another hobby :)