All right, here I need some suggestions. I've noticed a lack in low end power (and many of you may remember me posting on this). I finally got into the shop to ask about a x-over pipe to link my duals. The muffler guy (which everyone tells me, "knows his stuff") said that the power loss isn't from a lack of equalization, it was from a lack in back pressure (i.e. too high flow intake & exhaust). He told me I could either add backpressure (dumb) or I could build up the motor to use the high flow. He suggested power chip or cam. I WAS thinking in the future I may add headers, but I'm guessing here that would be a bad thing!... Anyway, I've looked at jet chips and hypertech chips - they all say I have to use 91 or better octane. I'm thinking not so good. I asked him on this and he said I could find some chips that didn't need higher octane gas. TO MAKE IT SHORT, can you make any suggestions on chips, or cams, or anything else? Thanks in advance!