Anybody use the year one hp exhaust manifolds ?

sirmopar said
Considering these to swap a 383 into my 69 valiant. Are they better or worse than the originals ? I am open for suggestions on why I should or shouldn’t use these. Motor will probably be 400 horsepower. I’m not buying tti headers. Thanks

That's a good price considering what some of these delusional people are asking for their 50 year old stuff. Id buy new.