Is this your '69? If so, is the starter relay mounted down on the inside surface of the wheel well, facing the exhaust manifold?
If so, that's the early factory position and is slightly closer (like 6" or so) to the starter than the '70 and later models.
Although, I didn't know that would make ours too long for the early applications.
Is there a way to just clamp it out of the way first? Such as aim it straight down along the wheel well, then down across the frame rail?
You running headers?
Paul