Here's a pic of another GT with the Opel 6cyl mod. The radiator wall crossmember appears to have been remade, but still in place, whereas the car above has it removed entirely. Both cars appear to have the longer hood and rear hinging. This car has the huge hood scoop to clear the huge oem Opel FI cylinder, but they appear to have scrapped the FI and installed triple side drafts instead, negating the need for the hood scoop:
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