Hey just a question for you guys out there that have done rockers. Mine is a 91' 350 tpi car. I just installed 1.6 roller tip rockers and have noticed a decrese in fuel mileage. Also, my oil pressure seems to move around more than it did before tends to stay lower now. Anyone experienced these symptoms also?

 

make sure the roller rockers are self-aligning and the gas they arre making now is terrible so mileage suffers

 

They (roller rockers) are also noisy- enough to set in KR from your knock sensor 'hearing' them. Lose timing, lose MPG. I recently did some work on my Colorado, and spaced torquing down the 3 bolts that hold my air box as I was trying to fit my res delete and ram air simultaneously. I dropped 2+ mpg, and could see MASSIVE amounts of KR in HPTuners all over. Torqued them down, and got my mpg back. Granted, the I5 is tuned very aggressively with KR sensitivity to the point of false KR, but FI SBC's are known for issues with roller rockers tripping the knock sensor.

Also, are you still suffering from the "NMHRF" syndrome (New Mod Heavy Right Foot). That kills more mpg than most mods would on their own.