1971 Imperial & 1970-1971 HP Exhaust Manifolds

[1970FuryConv]

My friend has 1971 Imperial, original 440/727 4-door hard top, log exhaust manifolds.
I have a set of 1970-1971 C-Body HP Exhaust Manifolds that I fronted him to look at for his Imperial.
He is having second thoughts about buying them because of fitment questions.
Has anyone put these manifolds on a 1971 Imperial? Fitment Difficulties?
I did suggest that he call TTI on head pipes. Did not suggest Waldron, but that's a back up idea. Thanks for any help!
3418351 left side casting number

2899879 Right side casting number

 

[marko]

just get a set of waldrons dual exhaust for a 70/71 chrysler TNT

(i have 69 HP manifolds and waldrons dual exh on my 78 Salon)

 

[1970FuryConv]

just get a set of waldrons dual exhaust for a 70/71 chrysler TNT

(i have 69 HP manifolds and waldrons dual exh on my 78 Salon)

Thanks. So there's no difference in the front subframe for the 1970-1971 Chryler 300 and 1970-1971 Imperial as far as head pipe/front pipe fitment?