Finished wiring cleanup Installed baffling Installed plenum Installed cowling Did 1hr test flight CHTs good for cylinders 2,3,4, never above 380 CHT for cylinder 1 too low, never hit 300 ... removed metal tape on front inlet Oil temp went too high at 225 ... removed lower inlet blocks, removed throttle body elbow and increased outlet opening at bottom end of cowling Had lower spark plugs fouled, so removed, cleaned and reinstalled them