1.5 Or 1.6 On J-heads??

would stay 1.5, I think you put a lot of stress with 1.6s and the angles get tkinda harsh. They will work but i think it is better to get the lift you desire from the cam and stay in the 1.5 rockers.

That being said, they will work but you may also need to make sure the push rods are clearing Ok too.