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How critical is the brushless motor kv. Is it possible to use a 2600kv or 3000kv motor? Want to build it and have some motors from my RC hobby parts bin I would like to use, if possible.
That may be a sewn in style headliner where the video doesn't apply. A lot of the 1970's cars are built a bit differently. Sewn in headliners were common and are much more difficult to do. If you see seems in the material running left to right, that is what you have.