Small Block & Big Block Chevy Specific - square port vortec heads

hey guys i got vortec heads on a 350 and they have square port heads, this might sound dumb but what kind of headers am i suppose to run on it. I spent the whole day tryin to find some with no avail. So can you guys either point me in the right direction or will the oval port hooker long tubes i have work?????

Yep, small block GEN I and II headers are all the same when aftermarket, you can open the vortec heads up to a more circular port. Thats what i did.