Yea we are building a set of 1 7/8 headers and I got an 850 holley but might build a 950 instead because it's just an out right better carburetor. I have a set of 5.13 gears and I notice alot of people run a pretty low gear it's just I don't know how we would make the 1/4 with it. We have a 29.5x10.5 tire and lite car. I don't know if changing the converter size and stall would either help or hurt the rpm's through the traps in the 1/4. I really don't want to be screamin the motor at 8000 rpm every pass but yet I want it to run good lol.