OK, I have done a bit more work on the plane like installed all airplumbing, elevator push rods, all control horns, and mounted and cut the cowl side gill openings. I am still a bit concerned about the engine size. I have ordered a pair of stand-offs to mount the engine. If all goes well I will fly the plane with NO cowl for its first attempts. No matter where I place the engine either with stand-offs forward or at the firewall with a shaft extension, I will have to cut the cowl for valve cover clearance. Sucks !! Hence I will attempt to fly without cowl first before i make any cuts.

Andrew, Do you have any videos of the original plane being tested and what engine was used on it? There has to be videos !!