Exhaust manifold question

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Reason I ask is because I have a 318 from a 75 Dart. I put it in a 74 Duster and, going to order an exhaust system for it. It doesn’t have the air injection ports, so all’s good there. Just making sure that the head pipes will work. Thanks for your help.
 
KENTON said:
Reason I ask is because I have a 318 from a 75 Dart. I put it in a 74 Duster and, going to order an exhaust system for it. It doesn’t have the air injection ports, so all’s good there. Just making sure that the head pipes will work. Thanks for your help.
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If the casting #s are different, I'd go with the Dart headpipes...if they show a different part#, .....wait a sec......Walker shows #40242 & Goerlich #93822 both '67-'74, then they changed for '75 even w/o catalyst.....but neither offered a Y-pipe for the '75 and ups...they were much longer, so no way of knowing if that was all that was changed. Hold You're old Y or pipes up to compare?
 
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