Alright, so I've been wanting to build a woodgasifier since I stumbled upon the concept on the backroads of the internet, and my collection of parts has been building up in the garage for a couple years, so it's definitely time to start melting some metal and get this done. I'm very glad I found this site, not only because it's so packed with useful info, but because it's awesome to see so many people dedicating time to studying and employing renewable energy. My stepdad has a Ford body welded onto a chevy frame with a 350. He says it's mine if I can get it running so I figured it would be an excellent cantidate for a woodgas build. I was planning on using a 12" air compressor tank for a hearth, maybe adding a small barrel to the top for extra hopper space. I think it's around 18" long. I have the top cut off. I was planning on a 2 inch constriction with the top welded to it and a shaker grate on the bottom of that. My biggest questions at this point are A) Has anybody tried a compressed sodium silicate and perlite refractory lining for a gasifier with any success? People use it for gas forges. B) Should the air coming into my hearth swirl as in angled nozzles? C) Is 3 nozzles too few? D) Would it be a bad Idea to drill 1/8" holes in the sides of my 1/4 inch nozzles, and should I reduce the orifice on the end of my nozzle tube? E) How far should it be between the nozzles and the constriction? F) how can I seal my shaker grate linkage where it comes through the outer casing(barrel that used to contain form oil)? Thanks ahead for any input and I will definitely continue reading to try and find answers to these and any other questions I come across.