The offset fuel tank means the exhaust pipes will need to be carefully routed to avoid it. This usually involves:
* Custom-bent pipes: A professional exhaust shop will need to fabricate custom pipes to navigate around the tank. Pre-bent kits are unlikely to work.
* Potential for clearance issues: Depending on the size of the exhaust system (pipe diameter), you might need to modify the heat shields, or even parts of the fuel tank's protective components.
* Increased cost: Custom fabrication is more expensive than using a pre-made kit.
* X-pipe or H-pipe: You'll likely need one of these to merge the exhaust before the muffler(s). Again, this will require custom work.
In short: While not impossible, installing dual exhaust on a '69 Plymouth Fury with a 318 is a significant project that requires the expertise of a skilled exhaust shop. They will be able to assess the specific challenges and provide a realistic quote and timeline. Don't expect a simple weekend project.
