look like doug thorley headers,they fit good
heres some pics. of husler headers i just got.
with that set the #8 pri. tube is not right in the way to hookup the heater hoses on the firewall,hookers are in the way of the heater pipes comeing into the engine compartment
i ran those dougs on my 63 ss/ fit great plus the stock heater works with no mods to the heater nipples
pm me and i will tell you what you need to do to get them on the easy way.the hole for them, were to cut,the beast way to run your brake lines.theres more to it than just bolting them on,the alt.bracket for long/short water pump ect. ect. its worth it in the long run.better than under chassis headers IMO no burned spark plug wires unlike under chassis headers. PEACE