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- Hemi Ram, 71 Plymth Scamp, 71 Plymth Duster 340, 69 Dart 340/4sp
every dealer has the potential to be different. However I will ask the service advisor tommorow how much he would charge. Then theres the question on whether they would do the work, because they wouldn't really be able to warranty it..... If you built the bottom end of the motor I would say the headgasket should be a walk in the park.......it's just removing a whole bunch of stuff.