With the oil cooler cover on and the cowl flap fully closed you should not have a problem, but what's really needed is a a simple cable operated cowl flap lever operable from the cockpit, very similar to that found in the Christan Eagle. Purely mechanical and perhaps doable with what the FAA calls a "field approval." I'll let you all know in the Spring if this works. A kit from ACA, while more costly, would certainly be preferable.
Jim Robins
7GCBC