440 In an F Article

I have a 79 Road Runner that the original owner put a 440 into. It has power steering and a brake booster from a 1988 D150 things are tight but it works he has reworked the headers around the steering box and I feel that it interrupts flow. I have been told by Rick at National Moparts that there is a set of headers available. I have asked him to confirm and price them
 
Bill Park said:
I have a 79 Road Runner that the original owner put a 440 into. It has power steering and a brake booster from a 1988 D150 things are tight but it works he has reworked the headers around the steering box and I feel that it interrupts flow. I have been told by Rick at National Moparts that there is a set of headers available. I have asked him to confirm and price them
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What size are the primary tubes and what size outlets? Freiburger proved you can ding the hell out of a set and not impact power.
 
Bill Park said:
Interesting were was this report?
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It was on an episode of Engine Masters. Used to be on YouTube before the corporate owner took Motor Trend behind a paywall.

Found it:

This is why I asked what the dimensions are for the headers you have currently. 1 5/8" primary tubes are good for about 450 HP.
 
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