help me put together my exhaust

I got the Summit kit. It fit pretty well to the Hedman headers I had. I did shorten one section, but a welder and chop saw made quick work of that. Yours may require a little bit more modification with the Dougs. Off topic, but, if you do nothing else, change the timing set on that engine. Failure of the old "silent" cam gear has ruined many an engine.