4 speed at the track - tips?

Anybody have a good suggestion as far as initial timing and jetting setup with my combo? I can't recall off the top of my head how it's jetted now, but I did drop them several numbers from how I got it - it was a new carb off a 572" Chevy crate motor - way too much jetting for my build. I'd like to re-time and possibly re-jet before I even get there - then adjust some more while I'm there.