Looking at buying new headers. JBA shorty vs MAC shorties. The Jab's are $100 +more than the Macs. Any suggestions or comments about either product would be appreciated.
Either product will likely suit you fine. In my opinion, you'll likely find that the JBAs are a tad more quality a product for the money. That said, MAC aren't junk, they just appeal more to a value-oriented application.
I ran a MAC H pipe on two of my past Mustangs and never had issues with fitment or longevity over the course of 5 years and 3 years of ownership, respectively.