Nitrous plumbing A1A...??..

Like this perhaps>

NOS 02010BNOS NOS Cheater Wet Nitrous System for 2x4 Dual 4150 4-barrel Carburetors-Black

Don't know what todays jetting is like but as an example back then a single 4 cheater system had 52n/59f for a 125 shot, 73n/82f-175 shot and 110n/110f-250 shot, these were all very rich tunes from NOS and you can understand why. I would imagine fuel jet is now smaller than the nitrous jet@5>6psi just follow their instructions on how much to back off the timing, normally its 2 deg for every 50hp. A 150 shot is where you start to notice a good power increase depending on the combo.