Big block question,,,,,,Headers or manifolds ?

Hi Everyone ,

I have a very sweet 73 Swinger that is extremely clean and unchallenged .
It is a Slant with auto,,,,,the only option it has is power steering .

I’m planning to drive it as is this year ,, but I plan on putting in a big block and 727 next year.
I have a set of block hugger headers,,,,but I would be just as happy with manifolds .
The headers I have are brand new,,,,,,I’m not even sure they will fit,,,lol !

The engine will be a low deck,,,,and I’m wondering about fitment of factory manifolds ?
Would any body manifolds fit ,,,or only Abody ?
I don’t want to use the restrictive driver’s manifold that wraps around the steering shaft .
Is that all that will fit ?

I have already purchased my Schumacher conversion mounts .
I’m just getting the other stuff ready for when I need it .

I have a Pro Street 70 Challenger,,,,,,this is the first A body I have ever been around .
Thanks guys for your help,,,,I love my new Dart,,,,I want to do it right .

Tommy