[RallyBird]

I have an opportunity to purchase a set of factory 1968 long branch manifolds. Any idea which is stronger and more durable. These factory manifolds are in very nice shape and have been ceramic coated.

[b-man]

Aftermarket are more durable, being made of ductile iron.

The factory ones are way more prone to cracking.

But sometimes it just comes down to what’s available.

[turbo69bird]

There’s after market available .

Depends what you need them for
A high end resto probably better with originals
But if your not restoring a car to stock it’s definitely aftermarket $1000 to $1700 for aftermarket depending on how fast you need to have them , I’ve bought sets cheaper at $700 $800 but you usually have to poke around a little
This is for round port no idea on d ports