159 degree rotary valve or the 147 on a modded 580 engine?

[92seadoo]

I'm doing a complete rebuild on my 92 SP with the 580 engine and I'm just about ready to put the engine back together. It had the 147 valve in it but it's in bad shape so I'm about to order a new one shortly but I wanted to see what the best option would be for this engine with the mods I have. I read that the 159 would be good since my rotary valve ports on the cases are ported and polished for more air and fuel. Any feedback will be great.

Modifications:
Mikuni 44 carb, Mariner intake, west coast pipe and water box, Solas prop, rotary valve holes on cases are ported and polished, ocean pro head, and just sent my cylinders to fullboreonline to get them bored for the Wossner forged pistons. Engine will be running on 101 octane and amsoil dominator...

 

[Matt Braley]

I'm not sure I've never messed with different valves on a 580