Is this cab mount correct?

['68 Newtricks]

I bought some core support and cab mounts. After putting the cab mounts on and stepping back I noticed it's got quite the rake. Seems like the rear is spaced off the frame farther than the front. It also doesn't seem the bolt's thread is long enough for this rear mount. Just as the rubber starts to compress, the captured nut bottoms out on the shank. I can't move it by hand unless I really really try.

The cab mounts came as a kit from LMC, in one bag, but this just doesn't seem right. The front rubber looks like hockey pucks, the rears look like this....

['68 Newtricks]

Also, I have a '68 body going on what looks to be a 69+ frame.
I haven't mounted the core support yet, but looking in the LMC catalog it shows that year split (67-68 and 69-72) for the core support. I ordered '68 but now I'm second guessing. I haven't tried it yet, seems the mount should be ordered for the BODY, not the frame. So, I might be worried for nothing. :/ The cab and bed are all the same mounts.

[67chevy1series]

It appears you installed c20 rear cab mounts on a halftone frame.... Your going to need to return those and get correct c10 2wd rear cab mounts.

[67chevy1series]

And as for rad. sup. mounts I would go with what the frame is. If your frame has the larger holes for cab mounts and rounded edges then go with a 69-72 mount and NOT a 67-68 mount even if your body is 67-68.

[Fitz]

Originally Posted by '68 Newtricks

Also, I have a '68 body going on what looks to be a 69+ frame.
I haven't mounted the core support yet, but looking in the LMC catalog it shows that year split (67-68 and 69-72) for the core support. I ordered '68 but now I'm second guessing. I haven't tried it yet, seems the mount should be ordered for the BODY, not the frame. So, I might be worried for nothing. :/ The cab and bed are all the same mounts.

Just another fine example of the service from LMC. The 67-68 cab mount looks like the photo. They sent you mounts for a 73-80 3/4 ton truck. Send those back and find another vendor. Like CPP or Classic Chevy (formerly Chevy Duty).

I quit dealing with LMC when they sent me rear axle mounting nuts that were grade 3 and made in China. Those nuts are torqued to 250 ft Lbs, well beyond the breaking strength of the grade 3 crap they sent.

['68 Newtricks]

Originally Posted by 67chevy1series

And as for rad. sup. mounts I would go with what the frame is. If your frame has the larger holes for cab mounts and rounded edges then go with a 69-72 mount and NOT a 67-68 mount even if your body is 67-68.

Yep, looked it up in their catalog. Everything is different with those rear mounts. Oldly enough the front cab mounts are the same, guess the 3/4 ton brackets are lower in the frame. Gotta find time to call and unfortunately I've had the mounts for probably a month now at least.

As for the core support, the diagram shows different length bolts between the 68 & 69+. Will they still fit through the core support if I go with the later year setup? Or am I looking at swapping out the frame mounts to match my 68?

Thanks guys!

[AirSpeed]

Those look like the cab mounts on my 72 4X4. The ones on my 69 2X are shorter.

[FirstOwner69]

As noted above those are the rear cushions for a 3/4 ton 2WD or any 4X4. Either they shipped the wrong kit, or you ordered from the wrong catalog page. I suggest that you could have ordered the wrong kit since they only identify the application at the top of the pages which is a bit confusing. I am not a big fan of LMC, but they were the only vendor where I saw the original type cab mounting hardware available. Frankly, I was quite impressed with the quality of the kit.

Here's a picture of my 3/4 ton frame mounts for comparison. You can see the lower positioning of the bracket, and, possibly, the greater depth of a 3/4 ton frame.

['68 Newtricks]

Yep
That is the question of the hour. Did I order the wrong ones or did they send the wrong ones. I know I ordered the wrong core mounts already. Damn things are pricy to be making mistakes. I think my whole 85 K5 blazer in poly was cheaper

[FirstOwner69]

Originally Posted by '68 Newtricks

Yep
That is the question of the hour. Did I order the wrong ones or did they send the wrong ones. I know I ordered the wrong core mounts already. Damn things are pricy to be making mistakes. I think my whole 85 K5 blazer in poly was cheaper

I just noticed the part numbers are only one apart, so they could have easily pulled the wrong kit... assuming the have then stocked in numerical order.

[FirstOwner69]

I don't know what to tell you about the core support mounts. I do know, however, that my early 69 came from the factory with the 67/68 style mounts. I ordered the 69-72 style first and ended up ordering the 67/68 style. Go figure.

['68 Newtricks]

Front core support frame mounts. What is?

[AirSpeed]

Stay away from LMC's leaf spring bushings, mine exploded after a year. I can see chunks of rubber squirting out of each mount. Pain in the butt to replace! Urethane next time.

[FirstOwner69]

Originally Posted by '68 Newtricks

Front core support frame mounts. What is?

Here's a picture of mine (3/4 ton). As I said above, I ended using the 67/68 kit since that's the type mine had from the factory. However, my originals had larger washers (probably due to larger holes in the 69 brackets) so I used the washers from the originals. I also couldn't get good gaps between the fenders and cab with the 69-72 core support mounting kit.