I am in the middle of installing 2 496ho 425hp engines into my 98 baja 29 outlaw. The boat had standard 454mpi engines in it before. It has the factory props that come with it from baja, without looking i want to say there 23p 3 blades. what pair of props will benefit me most now that i have more power in the boat?

I would start with a set of 26P bravos.

I only know about the single engine Bajas, they tend to like those stock Mirage plus props after some reworking to add more cup, which may give you the added pitch that your looking for. BBlades has a nice formula for that prop from what I've seen from other members here.