I know Heddman and Hooker both make 351W long tube swap headers for a '65, but which model(s) will work with my set up? I have a T5 with MustangSteve cable clutch. I have power steering too.
I don't recommend the heddman setup. I bought it for my swap and the first set didnt work worth a crap so I sent them back to heddman. They checked it in the jig and said it didnt fit so they sent me a new set but instead of the uncoated they sent me a set with htc without extra charge. Im not saying that they have bad customer service because they did everything possible to help me but even the second set didnt fit without notching the shock towers. If you are not prepared to cut the towers, try something else.
Maybe the new hedders didnt work on his application because he might have not used the swap motor mounts that mount your motor up 1" higher. My Hedman long tubes work perfect.
I actually did everything I could to get those things to fit. My shock towers must have sagged beyond spreading because try as I might they wouldnt fit anywhere I set the engine.
I just got off the phone with stan @ ford power train. He said he has stepped headers that he makes for your particular application. They run a little over $700 coated.
But if they work w/out any extra work wouldn't it be worth it? If you have to notch the towers, or fit them multiple times it is a PITA and may be well worth the money to have to drop them in. Remember, sometimes you get what you pay for.