Usable power for the street?

You wouldn't think the roller design brings some of that back?

Seems like it does since they are both rated at 300hp.

I'm just saying that with the dinky cam Mopar put in the 5.9, I would guess it wouldn't add more power to change anything out. Roller cam or not. I just doubt that it can make 350 hp without swapping the cam for something that actually has lobes on it.

The 350 on the other hand seems to have a decent sized cam and added 30 hp by swapping to the Vortec heads.

Note that in the test above that 5.9 made 350+ hp with a cam that was similar in size to the one in the 300hp 350 you mentioned.