Hello I was needing help with clearance issues with the headers on my 1965 Mustang Coupe. It has a 331 motor with Trick Flow heads. Both headers are hitting the shock towers and the gear box on the drivers side. I was wondering if anyone has had this problem and could tell me what headers to get. I have shorty headers now and the passengers side bolts up but is hitting shock tower. The drivers side won’t even bolt up due to clearance issues as it’s hitting the manual gear box. I was told that block hugger headers might work but would restrict flow. I hope someone can help me please. Thanks Mike

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sounds to me like you may have motor mount issues. a 331 is just a 289/302 block. really about any mustang header should fit fine. can you post pictures, or host them somewhere and post a link to them. I have long tube headers which i picked up from CJ i think. they have a decent amount of room. you should not need a block hugger header.

 

Since you have a nice motor setup, I would avoid block hugger or anything similar. Good shorties would be fine, but you don't want to restrict those nice heads.