inline six PAIR emission system really needed?

[steveos80c10]

i just bought a 1980 c10 with a 250 vin d, inline six and it has this PAIR system on top of the valve cover. im new to this kind of motor, period and i noticed other 250 inline 6s that dont have this emission control system.

anyone know or think its a bad idea to take this system off or if i can run the motor without the system. if anyone can help or toss me some information on this system or if its possible, that would be awesome.

new to the forums

thanks

steveo

ill throw up some pics later of engine and overall pic of truck