TR6 Gasoline Choice - Follow Up

["Radley, Jack" <JackR@SHRIVERCO.COM>]

As a follow up to my question about gasoline choices, I am sharing the
source of my confusion from the TR6 Reference pages
(http://www.mit.edu/people/zimerman/Documents/tr6/octane.html)
<http://www.mit.edu/people/zimerman/Documents/tr6/octane.html)> .  If I
read this correctly I come away with the inference that since I have a
76 TR6 with reduced compression, etc., etc. I don't need the highest
grade gasoline and would likely run better with a lower grade.  

Is this correct?  

Does it really matter? 

Jack Radley