Homemade exhaust questions ...

Hello Mopar people !
I have a 67' Dart originally feated with a Slant 6. I've have upgraded it with a '69 318ci. I had to built an exhaust pipe myself (way too expensive to ship to Europe). I was only able to make two pipes exiting each side before the rear wheels. They're not connected to each other. It doensn't sound too good ... Would it make a difference if I link the pipes (H style) ? Could it be because I hear my side's exhaust louder therefore I'd hear only half the cylinders ?
If you have an idea ... You're welcome !
thank you for reading.
:banghead: