As you're painfully aware, proper preparation and quality materials are the key to a quality, long lasting result. You need to remove old paint on your headliner trim, and thoroughly clean the door panels. There are several good products out there to do both. Try doing a search...others will chime in with their experiences.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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