Twin Mag 383 stroker Repower prop selection

I am repowering my 300 weekender that has twin 5.7 (260 hp.each) and 1.52:1 direct velvet drives/ with 17x16 props

The new setup that I have already purchased is twin 6.2 383 Mag Strokers (340 hp.each) and 1.91:1 direct velvet drives. I need help figuring out what props to purchase for the new setup. Has anyone done this type of repower on a 300?

I would talk to a couple of prop shops. They can recommend the proper props and also ask about shafts. You probably have 1 1/4 inch shafts and may need to upgraded to a stronger type metal to avoid possibly snapping a shaft.