You'll be good for several years with them,and there's nothing wrong with the JBA bolts,why spend money when you don't have to.Have you gave any thought to wrapping them.It keeps your underhood temps down noticably,and more importantly keeps the heat in the primaries and the exhaust gas velocity up,which promotes better cylinder scavenging.Wrapping them also helps keep your knock sensors happier,they sit right under the primaries,and have been known to detect the pinging that occurs inside a header and pull timing on you. Pay attention to the brake and fuel lines on the drivers side frame rail,alot of guys relocate the lines farther up and then wrap them in reflective heat shielding to help keep the heat on the lines down.
Before you bolt the drivers side header up tight,re-install the dipstick then tweak it to allow you enough clearance for it to pass through the primaries with-out touching them,that's where wrapping them also helps,the dipstick can contact a wrapped header with-out affecting the knock sensors.Buy lots of beer to,lol