302 question- AIR system plugs

My 95 F150 has the air crossover that passes between the heads. It was rusty
The holes are threaded but its a funky pitch

Any of you guys know where I can get a set of the plugs?


I ended up pulling the pieces and hammering them flat to block it off.

If the plugs are cheap Ill use em instead of spending on the crossover and valve.

i always just cut the pipe off with about 1" of it sticking out where it goes in the back of the head and pinch it off and weld it up and bolt it back on

You can get the bolts at the hardware store not sure of the size but they have them i did it many times and its not a funky size just big its a 5/8 bolt 15/16 head.

If memory serves me correctly they are 5/8-11 thread.