i might be building up a roller 350. it will have 041 heads, about 9.5:1 compression, performer intake and 600cfm performer carb, short headers, and probably a comp xtreme energy cam # XR264HR or XR270HR.

the car has an overdrive tranny with a .67 4th and 3.23 rear gears. what do you think the performance and fuel milage will be with this setup? thx

 

as long as you don't tear out of every redlight and stop sign, and drive it normally, you should get decent fuel mileage, probably around the 20MPG range, and even more on the highway.