There is some confusion about the "Super Chief". The CLC kit (I have one in the stack) is a much bigger Tom Dixon design, and has some LE sweep. Dave Royer has been flying his around the NW for years (and years!), with a Merco .49 or .61. Dave likes his Mercos, and has another one in a Humongus, which we've also seen him fly for years and years. The .49 and .61 use the same case casting, so the .49 is very heavy for a .49. I'd suggest a ST G.51, 2 Star .60, Merco .61, "Merco" Metamorph .61, Stalker .61 or bigger, ST .60bb, etc.
Recently, BMJR kitted another "Super Chief", which is based on GMA's revisions to the early Veco Chief...but it's a .35-.40 size. I guess that since CLC is gone, they figured it was ok to use the name. It is, but it's still going to cause some confusion. The BMJR kit sounds like it would be Classic legal, but the CLC kit is only legit in PA.
Steve