Sorry, I meant the bench part would be 2' high, I was going to try to use one of the small 36 inch tall
barrels like you can get from the quick lube places for my riser and build a standard burn tunnel
under that. I was also thinking I could get some Refractory cement and make the bottom part for the
burn tunnel over some 6 inch corrugated tube to get the shape then fill in the ridges after the tube
was removed from the molded piece to make the chamber smooth for better flow.
Hope that makes sense?