If you are doing it right, it's gonna run hot LOL.

max endbell timing would actually be to take the 4 dot and put it in with the dot's facing inboard, or backwards if you will. That will bump your timing to max.

I would NOT run that much timing though if you do put boost in. Put 36/72 on for gearing. First time out, run 2 laps, check temp, run 4 laps, check temp. Then run 2-3 min and check temp. as long as you are in that 140-150 deg range, you are good. If you are too hot, go down 1 tooth and repeat

Don't just slap the pinion on and run 10 minutes before checking. Check a few times early on so that you make sure that you dont have something wrong, and then once you feel that everything is fine, check after 5 min.

Just remember that just because your battery will last 20 min now, you don't want to be out there for 20 minutes. You'll overheat the motor.