I am converting my imca mod from an open motor to a 604 crate. I would like some suggestions for a starting point for gearing. I currently run a 388cu open motor with either 600 or 620 gear. The is a 3/8ths mile semi-banked. Normally the track slicks off mid-way through heat races. The car is using a 9in rearend. Where is a good place to start for gearing?
