If you ain't testing and learning your going backwards, standing still because every one else is testing
I'm surprised you don't have data logging or a race pack to read the EGT.
I have a set of headers on my S/P car that ended up with O2 sensor bungs in all 8 pipes to do some dyno testing years ago on a customers B1 engine that we dyno tested in Boise ,ID. 7 or 8 yrs ago.
The dyno operator insisted on us using them (8 O2 sensors) without thinking that motor had a cast single four barrel B1 intake with a single carb. It did make 920 KP at 7200 RPM with a goof up custom made Damn Best 1450 CFM Dominator type carb
Live and learn
Good on you guys for keeping the faith on using the Mopar brand 99 Hemi motors still
Keep up the good work