I added 2 1/4" dual exhaust (using the factory 318 manifolds & FlowMaster 40s), Edelbrock LD4B intake & 1406 carb, Lokar throttle & "kickdown" cables, Mopar Performance electronic ignition, and a Cloyes double roller timing chain & gear set to my 100,000+ mile 318, automatic transmission (A904), 3.23:1 sure-grip 8 3/4" rear end '71 Dart GT.
It's not a race car, but a fun ice cream parlor cruiser. Last summer our group made an approximate 1,000 mile road trip to St. Ignace (in Michigan's upper peninsula) for their annual car show.
Picture was taken on the north side of the Mackinac Bridge
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