13.3's to 11.8's to Forget it...

I started with the 188 valves and the 273 rockers and the second year I did more Port work myself and a couple hours by the machine shop and put 202's and the 1. 6 Hughes rockers the second year... Didn't see much bang for the buck with that..

So how much of a bang was it?
Tenth? 2 tenths?