Use the RB25 bracket and RB25 pump, the bracket has to have the top lug cut back level with the bottom two (as all three bolt to the block now instead of two on block one on head like normal RB25).
Just a side note on the pump.. what balancer are you using? if using say an RB26 ATI balancer you'll need to use an RB26 bracket and pump, the top lug still needs to be ground back though.