I currently have the short style headers in and Granny's mentions the BBK part#1569 Long Tube style header for a 351 that will fit rather nicely.
I am wondering if anyone else has another option for a long tube style header that is a little more Price friendly.
I hear MAC headers have a flange problem and don't seal correctly at the engine.

Thanks Lads.STYX.

 

maybe some sort of ebay header? maybe you can get something that is a start and modify it

 

I ran MAC headers on my 90 Mustang GT and had no issues with sealing. Like any header you may have to re-tighten the header bolts after a couple heat cycles. The only issue I had is after they run and if you take them off, they can fight you a little bit to go back on. But that's nothing a pry bar can't resolve.

EDIT: I wouldn't even call it an "issue". More of an annoyance. But def not a big deal.

 

MAC, BBK, Flowtech, Hooker, and many others according to the mustang guy at work.

 

Update:
BBK #1569 slip right in..
..a little low though so don't race over speed bumps!