came across some headers long tube ones for some old chevy he didn't say what. funny thing is he put them on ebay and he likes 5mins down the road, right now my 3rd gen only has a 305tpi but i'm just gatherin stuff to put on for when i do my engine swap gonna be either a 350 or 383

so you think i can fit these ?

he also has some from a 85 chevy truck pictured below