I finally did a test run of my Reo 6-200 engine tonight. I bought it as 'rebuilt' from a guy in St Louis in early March. It has new rods, mains, pistons/ liners, camshaft, head work, etc. 400 cu in 4.25" bore and 4.7" stroke. 364ftlb at 1200rpm and 200HP at 3400rpm. Runs great, very snappy. It will replace the 331 cubic inch currently in my bobbed '52 Studebaker M35. Still have to fix a few seeps, clean and install the oil filter/ cooler, swap the bellhousing, paint, etc.