I think I'd go with Option No. 1 that Larry Flesner posted... use the smaller (4 qt.) oil sump and keep on going with your cowling. I have an A-65 on my Pietenpol and it has a 4 qt. sump. I believe they all interchange on the small Continentals but the point is, 6 or more quarts are unnecessary unless you're trying to do some oil cooling via the sump or you're doing some transoceanic/endurance flying.
Minimum operating oil level is 2 qts. on these engines and if you check oil level before every flight and have a decently tight engine, it will take a heck of a long time to blow out or burn two quarts. And if it's spraying onto your windshield or into your cockpit, that's two less quarts of mess you'll need to clean out ;o) Oscar Zuniga San Antonio, TX mailto: taildr...@hotmail.com website at http://www.flysquirrel.net