jetting, metering rods, and timing. Add on a wideband and you can tune the edelbrock. Nothing is ever OOTB on these cars. I had a 750 eddy and tuned the heck out of it...i wanted more...She sits with Dual 500 Eddy's now, both are jetted, metered, and the timing is set she needs to be. The only main difference between my setup and 95% of others on here, I run a mechanical advance MSD.