Be ready to do some serious grinding on that Clay Smith pump. Had to grind the block on my 440, ran out of room on the pump.
I hit it lucky and didn't have to clearance the block at all but it is a snug fit as it sits. I did have to clearance the pump almost to one of the screws. Last motor was a little over 600hp running with this pump and held a steady 7psi all the way down the track. Hopefully it will keep up with the new motor as well. Time will tell.