So I am ready to fire my 235...I actually did start it, but stopped because I wanted to double check that what I am doing is correct. I'm pretty sure it is, but it can't hurt to double check right? I have a rebuilt 235 with Tom Langdon's dual carter weber carb setup on a fenton intake with his HEI. Everything seems to be going good. It fired right up after priming to motor, but I had a pretty good exhaust leak so I killed it. I tightened up my ehaust connections and re-fired it. I still had a bit of an exhaust leak but this time the rpm's were higher and seemed to keep increasing, so I once again killed the motor after a few seconds. I am guessing the rpm's were higher because of the chokes, but I stopped just incase I was too lean or something else possibly. My initial fuel mix screw settings were 1.5 turns out and the idle screw wasn't even near the linkage to do anything at that point. I'm fairly certain that the break in procedure for the new motor with solid lifters is to fire it and run it for about 20 minutes at 2000rpm. My question though, is that since there is no way of having all 3 things (timing, fuel mix, and getting it up to 2000rpm) happen perfectly all at the same time, how can I not screw up my new motor by possibly running it too lean or having my timing too far off while getting the rpms up to break in the cam? I am guessing that I want to get the rpms up first. So if I fire it again and it is running well enough should I just get the rpms up for the 20 minutes and then start dialing everything else in?