TTI headers and 3" summit exhaust

Has anyone used TTI headers with the summit 3" exhaust? If so how hard were they to make fit to the collector? How was the fitment going out back? I am going to be be installing it on a 68 barracuda with a Dana 60 and stock fuel tank location. Thanks!

Have not experience with the combination,but when mixing one brands headers are another brands headerback system i would start from the back when installing the exhast to make everything sit where its supposed to be under the car losely and then adjust the front pipesections to fit, going from the front to back when the parts dont match right may create more problems along the way where you end up having to adjust all pieces and still end up with a terrible fit instead of a great fit with just a few cuts and welds at the front.
Just have patience,measure twice and if you have to cut twice better to cut alitle to little than to much.