72' 340 Drivers side HP manifold vs older HP manifold

Thanks for the great reply treblig. I'm generally not a fan of headers for all the reasons you mentioned which is why I'm asking all these questions to begin with. So what I'm hearing is that manifolds for the most part are going to perform we'll with the the exception of perhaps higher rpm use which all be it fun, is not the range we mostly drive in anyway.
Did you mean to say that the early manifolds hug and fit better that the later manifolds? If you re read that section it says early fits better than 'older'?

I'm contemplating these so I can put on normal exhaust and also get the ride height back to more of a normal stance on the car. I just got the car and this is how the previous owner had it all set up.

Thanks so much!

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if i were going to put manifolds back on that car i'd put the correct ones for it on. i think it would just look better with the correct ones on it.