Find NOS, good or repairable used GM. I've used D.corn, CHL, Goodmark, Legion and AMD. AMD quarters are the best of the bunch. They're not without isssues and I expected that. AMD requires a minor one at the quarter window. Other RH quarters have multiple issues that require more mods. D.corn roof skin went on with only a minor A-pillar mod. Goodmark fenders poorly stamped around headlight and have voids, LH fender bow wrong. Goodmark quarters have multiple issues shared with D.corn and Legion and CHL. Goodmark door hem bad. Decklids run narrow. Some tailpanel bodylines in wrong place, AMD is correct. AMD quarters line up well with their tailpanel. Beware of driprail bead inconsistencies between sailpanels and roof skins. All repro tin varies and requires mods no matter what. Expect more and you will be disappointed.
What does Heartbeat City make on this dirt and where is their facility?