The plan is to build a 500" based on a 400 block. Aluminum rods, and main caps with block filler. Looking to make about 700 hp on motor and have a 300 hit or so of nitrous. I have an eagle crank with the standard 400 mains. I am finding that the main bearing selection is very limited. I see 440 source carries chamfered clevite p-series bearings full groove. I am wondering if these will be able to handle what I have planned. Are there any other options that anybody knows of?? Any information or experience is appreciated.

Thanks, Cody