I saw a bunch of threads on 453 at Abodiesonly and they say thet work fine with what you have.
I was looking as might swap to them from my Hooker Super Comp. For 2 reasons

1) The Hookers hang low and the 453 do not and still clear all.thr stuff.
And 2) I do not like where the collectors end up.

I have looked and did not see how the 453 collectors are.
Was hoping the collectors come out where the factory put the headpipes in the crewmember. As I want the pipes tucked in the same place they were with the manifolds with the Hookers you have to go low and put a Big Woop De Doo at the collectors
Sorry if I highjacked your thread Ron.