I would really try to put one in #7 as I already suggested for those reasons, put the other one in the easiest one on the passenger side up If you wanted to pull the headers off the car and have bungs welded into all eight pipes you could move the probes around and see what they all show at part throttle and at WOT work Will your system EGT record and play back or transfer the stored information to a viewable device like a laptop?
I bought a LM1 years ago and use to record a run and then load it onto my laptop to replay the results on a bigger screen at my pleasure up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)