904 build. Where to get kits?

Getting ready to build a 904 with a 999 low gear set. Where is the best bang for the buck on master kit? I would like to get the Alto clutches and Kolene steels. How much better are they then OEM clutches?

It is going behind a 350hp 360 with a 2500 stall converter. Recommendations and ruminations on Alto vs. Oem clutches or bands for that matter.

Thanks,
Dan...