587 heads

With that set up,.... and you can get away with a clean up on the seat......I would stick with the 1.88 and concentrate on a good 65/75 degree bowl cut, too go with the valve grind/job

A lot cheaper then having the 2.02 cut and will make a nice jump in cfm with the bowl cut to go with the porting/clean up done before.
60/75 degree bowl cut, opens up the throat a lot, and at this stage will breath better.