Kevin,
We decided to run smaller hoses on one of our small block Chevy dyno mules just to see what kind of results we could get. We had been in the process of studying windage. We ran clear -8AN, -10AN, & -12AN lines with an oil pan that had a Lexan window in it and video taped the results.
One other thing you may want to try is stepping your scavange and return lines down one size. We found that switching from -12AN to -10AN scavange and return lines had a drastic effect on the amount of aerated oil seen in the dry sump tank while on the dyno. It also helped eliminate oil surging...
Moroso Performance in Guilford, CT will work with you on designing and building just about any oil pan or dry sump oil tank. Moroso Phone # 800 544-8894.
Good Luck with your project!