Tying in Utica system to existing header

Snowmelt

I took old boiler out. I have a 5 section Utica with the header of the old system, the header is a 4 inch header. It’s also a drip system with returns near the boiler.
I drew a diagram of how I think I’m going to pipe it.
Question is Utica told me to follow the near boiler piping kit as close as possibly then to the left of the picture going from 2 1/2 to 4 where would be the better place to do this?

neilc

don't forget that the 2 boiler risers want swing joints also,
bring both 2.5 risers up to that existing header height, 90s or 45s(whatever works) over to connect to header,
add a 4 inch tee horizontally at the left of the header,
keep the header pitched down to the equalizer

neilc