YotaTech Forums - Header identification help

https://cimg9.ibsrv.net/gimg/www.yot...22dfce3faa.jpgSo this was on an 83, but the head must have been later w the pear exhaust ports. Im wondering if it will work on my 83 w round exhaust, and what is up with the two holes/plugs (scissors pointing at one of them) those are ports in my head, and pics of other headers have holes there, is this a problem? Also wondering if this header is worth my time w removing the pair system and figuring out putting a cat on it, it looks like somebody bubba'd the flange/collector. Thanx