lux hauler checked the thread you recomended. So you're not in favor of headers? You thinking duals but stock manifold? Could be. Just asking around to see what people think. I come from the old school where headers were the "thing". Thanks for the compliment on the car. Going through it bit by bit. Today I removed the hydraulic pump for the leveling system. It had some pulley issues and it never quite lined up right. So I'm drilling some new holes in the mounting platform. Knew it needed to be done so today was the day. They used the second slot on the power steering pump pulley to drive it. When I add AC later that pulley slot is needed for the compressor so will have to figure something out. Maybe longer belt as long as I can get everything to line up. This is factory installed by Superior Coach who built these for Cadillac. It is a hydraulic system that allows you to shift the or level left and right so if you were on uneven ground at a grave site that the car could be leveled for casket removal. According to Superior this is one of only 116 that they manufactured. It is called a three way loader because there is an electric table inside and if you open the suicide doors and release the lever the table moves forward, turns, and comes out of the side of the car with the casket on it. You can see the coffin behind me in the picture. It's black so it's a little tuff to see.
I'm not against headers. They can definitely help to make HP but on a stock or very mild motor being driven on the street as a daily driver they can be more hassle than they're worth. Exhaust manifolds require little (if any) maintenance. If you don't mind the extra maintenance, I say go for it.
I have a set of Hooker Comps that I'll have to modify for my truck. When I get them cut and welded to fit, I'll send them out to be coated. That way I won't have to worry about the rust issue. They'll go on eventually but I'll use the manifolds for the time being.
Remember, the carb may need a little adjustment after the freer-flowing exhaust is installed.