my goal for this motor is that i just want it to breathe easier, and run with less resistance, MPG is the name of the game and power just seems to be a by product.
i already have a cold air, ported intake manifold, ported TB, 3923 autolites, and an MSD blaster coil
now i am thinking of going to 1.7 roller rockers. what is the stock lift ratio?, and if i increase this, is my MPG going to go down?

 

Stock ratio is 1.6. And I would expect the MPG be the same.

 

No real proof since I did a lot of stuff at the same time but if anything, the 1.7 RRs did help with MPG a bit.