Question about the speedmaster heads.

[MerlinsMopar]

I want to buy a set of these for my 340 e body and need to know something about the exhaust ports are raised. Will that cause any interference with the dougs d453 headers? Also, do they have hardened seats for unleaded? Main reason thst I want them.

 

[replicaracer43]

Exhaust ports are stock location and yes they have hardened seats

 

[318willrun]

I want to buy a set of these for my 340 e body and need to know something about the exhaust ports are raised. Will that cause any interference with the dougs d453 headers? Also, do they have hardened seats for unleaded? Main reason thst I want them.

I'm using the same Doug headers on my SM heads that was on my factory 360 heads zero issue

 

[MerlinsMopar]

I'm using the same Doug headers on my SM heads that was on my factory 360 heads zero issue

Thanks for the info. Much appreciated!