Re: Very lucky Clock/Tach EBay purchase
 

I am all about making stuff easier on myself. And you get a nice little boost of chrome frontloading as well. As for the knobs, I too like the chrome knobs better, so I went with Chevrolet knobs which are black with chrome rings. They are shaped just like the 1960 GMC knobs, but lack the grey color. I can see why original owners opted for more bling. Those grey knobs are pretty sad when your buddy has a new Chevy with black against chrome, of the exact same shape. I could see how the GMC guys would want an upgrade of dash bling. Frankly, the GMC interiors were pretty Spartan. Those colors were sleepers. I had to wake my trucks interior up, so I matched the outside colors. It looks a lot more lively than before. Its all personal preference, after all. I prefer a rubber mat to carpet, chrome knobs to grey and GMC had more chrome than Chevy in 1960,on the outside of the truck. Chevy had anodized aluminum grills, where GMC had chrome. Chevy offered a small chrome ring around the rear glass that GMC did not. I added it to my truck because I like chrome, and it accents the rear glass perfectly. GMC chrome grill with its chrome eyebrow moldings and letters looks so good ,they kept it thru 1966. The Chevy grills were a little thin looking by comparison. But they all look better than a lot of what we have to choose from now. Greg Mead

Re: Very lucky Clock/Tach EBay purchase
 

According to the GMC literature screw on U shape clips were supplied with the clock for installation from the back, furthermore mounting it from the back makes the gauge blend in with the rest of the gauges and not look like an add on. As far as being a dealer installed accessory that's not quite true. My fathers 62 K1000 came equipped with the clock from the factory but upon delivery of the truck he requested they add the corresponding gauge to left side of the cluster which was a Bat-O-Meter, it too was installed from the back side.

Re: Very lucky Clock/Tach EBay purchase
 

Looking at your gauges they appear to be mounted properly, the differences being the holes were cut to larger diameter over what the blank pods were outlined for, this too has advantages if you want more chrome to be shown:thumbsup:

Re: Very lucky Clock/Tach EBay purchase
 

Here is the sending unit for the Sun tachometer, provided you have a V6 engine.

http://www.ebay.com/itm/SUN-TACH-TRA...dabdbf&vxp=mtr

Re: Very lucky Clock/Tach EBay purchase
 

I have the original paperwork from 1965 when my Dad ordered the one ton Suburban. It says the clock ($17.55) and the 270 degree Sun tach ($50.00) were installed by the dealer before Dad took delivery. They're both mounted from the front.

Re: Very lucky Clock/Tach EBay purchase
 

Just a thought, but maybe the dealers tended to front mount simply because it was easier. I would think they could front mount without removing the entire gauge assembly and panel. Perhaps there cuts would not have to be as accurate, with the chrome bezel there to cover the cut edge of the hole. To back mount ,you might have to remove them so you can get them in correctly. And I know to back mount you have to be dead on, on your hole cutting. Just a thought. Greg Mead

Re: Very lucky Clock/Tach EBay purchase
 

I've cut quite a few of these clusters for back mounting and the way they were designed it didn't even require using a hole saw. I did one right at one of our mini meets in 2004 at Brooks Oregon on Sam Roes truck. I drilled a hole big enough to fit a hacksaw blade then cut 3 slits in the plastic and broke them off, it tends to break right at the perforated chrome circle that establishes the proper hole size followed with some 40 & 80 grit sandpaper to finish the holes edges. If you want more chrome to show then it will require using a bigger hole saw and that's where it becomes really critical to be right on center with drilling.

Re: Very lucky Clock/Tach EBay purchase
 

Ed, looking at the pic the clock appears to be back mounted but the dealer cut the hole out larger so the chrome bezel is more pronounced, For the most these borg clocks supplied to GMC came with two small screw on clamps that only allowed for back mounting, if you can check and see if this is correct.

Re: Very lucky Clock/Tach EBay purchase
 

I would like to see some pictures on how these gauges are back mounted, so if/when I find a set, I'll know how to mount them.

Re: Very lucky Clock/Tach EBay purchase
 

I've got pics of the back mounting, I have to search in my files so I will post them soon.