1964 GMC 1000 axle flip kit
 

I’ve been lurking around here forever and I can usually find what I need just by researching this site. However, I can’t seem to find anything about this. Does anyone have a source for an axle flip kit for a 1964 GMC? Plenty of stuff for Chevrolets but nothing for the GMC’s with leaf spring rear ends.

Re: 1964 GMC 1000 axle flip kit
 

good luck. Not a lot out there for GMC specific stuff

Re: 1964 GMC 1000 axle flip kit
 

Take some measurements to verify, but you may be able to use an axle flip kit for a squarebody. If your axle tube diameter is the same as a truck 12 bolt from the 70s, and the leaf spring width is the same, in theory, it should work

Re: 1964 GMC 1000 axle flip kit
 

Pre-73 GM truck leafs were narrower (2.25 vs. 2.5") IIRC. A later model flip kit might require some trimming or tweaking but could provide some useful parts.

Re: 1964 GMC 1000 axle flip kit
 

The squarebody frame is taller and narrower than the Gen 1 frame, A flip kit for one won't work for the other.
Get some 1/4 x 4" flat bar and build your own.

Re: 1964 GMC 1000 axle flip kit
 

I'm curious.... How does the frame rail differences between the two eras have an impact w/the flip kit method of lowering?

Re: 1964 GMC 1000 axle flip kit
 

I was referring to installing a C-notch. I neglected to mention my 66 GMC will need a notch to flip the axle, because I'll get a 5" drop, but only have about 2" of travel before the flipped axle hits the frame.
The C-notch method will be the same between generations, but the frame dimensions are different. So, pre-cut pieces for a squarebody will not fit the frame of a 60-65.
Sorry for the incomplete information.

Here's something that might be useful:
76 C10 12-bolt axle tube dia = 3"
Spring width = 2-1/2"
66 Dana 44 axle Tube dia = 2-5/8"
Spring width = 2-3/8"

Re: 1964 GMC 1000 axle flip kit
 

Gotcha.

Re: 1964 GMC 1000 axle flip kit
 

Sorry for the late reply to the thread, but I actually have a flip kit that will fit your truck that I'd be willing to let go. I wound up flipping my spring perches and re welding them on my setup. Only thing that's missing from the kit is the u bolts, but those are pretty easy to come by. Also in reference to your notch question, a 64-66 c10 notch kit should work fine for you. I used that generation step notch on mine and it works great.