If I had the EGTs on the hot cylinders and they were mounted pretty close into the port and done right I'd be shooting for 1400-1425 F range.

My EGTs are on the wrong cylinders for my motor, #1 and #6, are mounted a bit further away from the port than they should be, and I shoot for about 1325-1350 F, no more than that as I know the hot cylinders should be running a bit leaner due to intake design (carb motor). Clearly a guesstimate on my part but I need to be safe and not toast a motor. Still might be unsafe too since I'm not on the right cylinders....

If you want to be fairly safe 1300-1350F.

YMMV.