Sadly, it wont fit on a 77, though it might be close. The profile of the gutter is matched to each rack. We were close to getting the template done on a 77 series here in Michigan but the truck was sold and I don't have a template now. It won't be a terribly tough rack to do and it should work on 76/77/78 trucks I believe so it definitely needs to happen@Godwin @dogfishlake I want to see if I can make this work on a 77 series. Been trying to get in touch with Bowfin through their website for dimensions, but no luck on response. Could you please provide the width between uprights, the overall length. And height from gutter channel to the bottom of the crossbar, to see if it has enough height to clear the bubble of the 70 series roof.
Much appreciated.