I'd say go ahead and put in the 11 inch set. You'll be glad you did later - especially if there's any chance that you may eventually hop up the small block.

I swapped out a stock 230 for a mildly modified 292. The stock clutch was a ten incher but I went up to an 11 inch just because it made logical sense to me - logical sense that I wanted to do easier BURNOUTS! :p

If I had it to do over again, I would go up to a 12 inch clutch - why not if the cost wasn't significantly higher than the 11 inch.

-ftyler