stock or not

i have a '91 b2200, but my truck isn't carbuerated it has a throttle body i don't its the original motor how can i tell, i wanted to order some parts for it but i don't wanna get the wrong stuff

some 91's came f.i. depend where u live, ive seen 1 91 f.i. here, but mine was built in sept 91, concidered a 92 on the v.i.n, if u got a pic of the motor i can tell u right away what it really is, ive got a f.i. and there isnt really much differece between general parts generaly

i know that most parts are the same but the main thing i was really curious about was a pacesetter header because it says for carbuerated mototrs only is that true or is that just for emissions

lots of people put them on f.i.'s i cant see y not, the heads are th same, just for the emissions

thats what i thought but i wanted to be sure before i shelled out the cash