Elwyn I'll risk it to say that's a Steve Wooley Argus. The very slender rear fuselage and super low ground stance makes me believe so. The bottom fuselage and cowling appears to have been left more square than the original. No clue on the builder.
Dave
It's been told that Steve left zero ground clearance for the prop. He then took off a few times to grind the tips down to about 9 3/4" diameter which he thought was about right. The Cobra in the museum seems to prove that out exactly.