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Anyone here running a GV overdrive? Thinking about one for my Satellite.
I have one in my '67 Coronet w 610 hp 496" n torqueflite 727. I use it purely as overdrive in Drive. Works great. But does require massaging the tunnel. A slightly curved air hammer head and a bit over 1/4" of massaging works.
That’s one of the things I was worried about, I don’t really want to have to massage anything. Thanks for your reply
I have 2 GV units and I enlarged both tunnels with a larger diameter section to fit them in. Mike
I´m thinking of installing a GV unit in my car. Currently the car is in rotiserrie for restoration so "massaging" of the tunnel is not a big issue. However, I would prefer to do the necessary tunnel work before blasting and painting of the body. Anybody having good pictures of the GV installation and the needed tunnel work?
Not my car as I run a less common version.... https://www.forbbodiesonly.com/moparforum/threads/1968-383-charger-gear-vendors-installation.32887/
Thanks for the link!
The conversion on my 65 Belvedere: I started here but did not like the transitions so, I went here: And I incorporated a drive shaft loop: After Raptor bed liner:
I can see you did not go the massaging way... but looks good! Do you know if there is less space in the tunnel in -65 than -66?
Nice job Mike. No driveshaft will ever get past that loop. Why did you choose to reinforce the front rockers with boxes but not the rear? I usually see both done if any are done.
I really did not have a reason for that but, having the springs moved inboard takes some of the stress off that area. The front boxes were an afterthought and easy to fabricate. Mike
Oh yes there is. I have a GV OD in my 66 Belvedere SW too. I blew out the tunnel on that install but, it doesn't look nearly as nice. Mike
Mike, I need to redo my tunnel like yours. Had already planned that when I get to that area. I originally went after it using a hammer faced bit on my air chisel and just massaged the tunnel around. It clears but looks like poo and there are a couple of tears.
I farmed out the tunnel forming to a sheet metal fab shop I use. If I recall correctly, I specified a 9 1/4" diameter. I used 18 gauge but, it proved easy to dent, so be careful. I extended the front to cover the rear of the trans hump and welded in a filler piece on the bottom (sort of a horseshoe shape) to box in the gap. That way the torsion bar cross member was left intact. Mike
Pick up this months issue of Hot Rod. They have an article on GV.