Vinny,
Back in the day, my old Dodge had a ... 'modular' (yeah, that's the word we'll use) exhaust system. I'd pieced it together so many times with clamped on pipes & parts that it was the epitome of uber-ugly.
It worked for a while but the happiest day of my life was when I took it in and had a professional rebuild everything and weld it all together. I just got tired of fixing exhaust leaks.
I'd recommend that you find some Mom-N-Pop shop that'll do the work for you at a reasonable price & get it done right.
Thats my $.02 ... & I want change.
Tom