J Heads

The 1.88's are very good for the street. A street machine type ride. Nothing to out of the box. Small cam dual plane type combo.
A 2.02 can be used in the street as well, but the price of the part and work on valve size alone doesn't give a great bang for the buck until you start porting and making use of large (r) cams.
Having done the swap myself on my J heads, it's not a bad upgrade. A minor loss of torque for a minor gain in HP.