Just use the stock exhaust cam and the .328" intake cam, and run it.
Look, on the Ace Magnum cams, we run .025" less lift on the exhaust cam, than we have on the intake cam. Many performance packages are set up this way. The exhaust doesn't need as much lift in most cases, because it comes out at high pressure, and exits quickly anyway, and we need some exhaust gas left at the end of the stroke to do the extraction work, so we want to let it out in a controlled way.
Don't worry about having less lift on the exhaust. it works out fine that way.