Thoughts/do I need to dent my new headers, new pics ?

I would call TTI and see what they recommend for mounts. Also, investigate that you have the correct pittman and idler arms. Don't think about it, just DO IT. These cars are old and you could have anything on there. Even if you replaced them, double check. I would do everything in my power not to dent those headers. For what they cost, they are SUPPOSED to fit. ......and that ain't fittin.