Rv4 o320 vetterman 4 pipe
The late Dave Beisemier made me 4 injector nozzles out of stainless bolts. Held in by band clamps same as your egt probe. Dia of nozzles are .100 inch ( .100 is to small and prone to blockage from burn residue. Your an fittings will work fine I used those on my pitts set up
My nozzles are about 4 inches below exhaust port. I used 1/8 inch stainless lines from a homemade flow divider to each pipe. (I would use 3/16 or 1/4 lines if i did it over) also would have moved the injectors to just above the ball/slip joints
4 gallon tank in fwd part of bag comparment wwlded .050 6061 sure flow ag sprayer pump 70 psi. ( bigger lines would allow for a smaller low pressur pump ( facet fuel pump).
No regulator runs through 4 gallons in about 8 mins
Makes great smoke if using good smoke oil. Cheap substitutes give crappy smoke