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06-11-2022, 05:21 PM | #1 |
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Location: Fort Walton Beach, Fl
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Cab mount question
Can anyone tell me how thick the cab mount spacers are on a 51 3100.
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06-12-2022, 11:26 AM | #2 |
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Re: Cab mount question
here is a link that may have some specs if you dig through it. at the bottom of each page you are able to go to the index and pick another year thats close. some years have more info than others. an assembly manual would give that info if anybody is "watching" and has one they could look it up for you. been awhile since my last AD episode but I seem to remember a rear cab mount shackle like a leaf spring would have, I just don't remember the front mount, it seems to me the front mount is simply some rubber insulator between the cab and frame with metal washers for shims? there will be a dimension between the frame and cab in the assembly manual for sure. not sure if the old cars manual project will show that or not.
http://chevy.oldcarmanualproject.com...to/51index.htm |
06-12-2022, 11:47 AM | #3 |
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Re: Cab mount question
I didn't think about the assembly manual I have one somewhere. I am building solid rear mounts. The original mounts are shot and I am not a fan of them.
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06-12-2022, 01:13 PM | #4 |
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Re: Cab mount question
Yeah, good idea. Check to space required off the frame then use a stock body mount from something newer or a urethane mount from energy suspension or maybe a stock mount from a 55-59 if you wanna stay old fashioned, nearly period, correct. I have used energy suspension stuff before with good results. Use silicone brake grease on them so they dint squeak.
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06-12-2022, 01:29 PM | #5 |
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Re: Cab mount question
If you are running the stock frame you just need the measurements for the cab floor off the frame rail.
It reads .78 between the top of the frame rail and the cab floor. I've been thinking about doing the designing for a while and this is what I came up with, Fab the bracket so that it allows for the rubber or poly cushion and leaves space for shims that you make. The revised (if you can call it that uses the two bolt holes that you would use to attach the stock shackle mount to the cab floor with a rubber/ poly mount . I used 55/57 Chevy Motor mount biscuits for the body mounts when I put my 51 Mercury body on the 75 Monte Carlo frame and that worked well. They are easy to find, and not expensive. A guy would have to do a bit of trimming to get two of them to fit side by side with that bolt pattern though. It should be pretty simple to lay out the holes for the bracket to the cab. One could make the bracket a bolt on unit if they wanted to. I'd rather leave a bit of space and have to add shims to get it to the correct height rather than find out that I had the bracket too high on the frame and needed to make changes.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
06-12-2022, 07:46 PM | #6 |
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Re: Cab mount question
That's very similar to what I built. I used 1/4 flat bar. I have some rubber I got as a drop at the hose shop I am going to make spacers out of. Hopefully I will be able to fit everything next weekend.
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06-12-2022, 08:19 PM | #7 |
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Re: Cab mount question
There are a lot of things that a guy/gal could do for the rubber/poly part. I've cut sidewalls out of junk tires to make the rubber pads for the core support more than once and a few layers could make the pad there if you had a couple of layers on the bottom ide of the bracket too.
If there is an industrial plastics shop close by they probably have left over pieces of poly material similar to the poly motormount or chassis bushing that you could get pretty reasonable.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
06-13-2022, 10:57 PM | #8 |
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Re: Cab mount question
I posed the question of mounting a 6400 cab with stock rear swing body mounts to a 3100/3600 frame, being they have different bolt patterns, on one of these truck sites needing bolt patterns, and someone responded with their version of the 90deg bracket. Solid bracket with poly or rubber top bushing.
A bit of custom work for something different.
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Chip '51 Chevy 3600 5 window C4 Vette front/rear suspension & drive train full Rusto-Mod '92 GMC Sonoma GT VIN #0015 '91 GMC Sonoma GT extended cab 1 of 1 |
06-14-2022, 02:19 AM | #9 | |
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Re: Cab mount question
Quote:
I didn't know that there was a difference between the brackets on 3000 series and 4000 and up until someone posed the question one day and I went out and looked and then happened to look at the image I posted in an earlier post. Since I am stretching my cab and moving the cab mounts back 9-1/4 inches it is just as easy to make the brackets as figure out where to drill new holes . I don't plan to take the truck across any rough fields when it is done but may have to grade my driveway so the truck won't get hung up.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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06-14-2022, 08:23 PM | #10 |
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Re: Cab mount question
If you are stretching the cab, are you also lengthening the running boards or shortening the bed.
Or no running boards... that meet up with the rear fenders. I just judged the space between the cab and running board to set the straight to staggered bolt hole difference against the frame.
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Chip '51 Chevy 3600 5 window C4 Vette front/rear suspension & drive train full Rusto-Mod '92 GMC Sonoma GT VIN #0015 '91 GMC Sonoma GT extended cab 1 of 1 |
06-14-2022, 10:47 PM | #11 | |
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Re: Cab mount question
Quote:
was it me?
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the mass of men live lives of quiet desperation if there is a problem, I can have it. new project WAYNE http://67-72chevytrucks.com/vboard/s...d.php?t=844393 |
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06-14-2022, 11:48 PM | #12 | |
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Re: Cab mount question
Quote:
__________________
Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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06-15-2022, 09:23 PM | #13 |
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Re: Cab mount question
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Chip '51 Chevy 3600 5 window C4 Vette front/rear suspension & drive train full Rusto-Mod '92 GMC Sonoma GT VIN #0015 '91 GMC Sonoma GT extended cab 1 of 1 |
06-15-2022, 09:31 PM | #14 |
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Re: Cab mount question
Kool. I was only looking at adding 5" to the cab. Great idea about using long bed frame and standard bed. At that length of a stretch, you could have that seat so far back you can squat sitting and barely see over the dash, elbow out the window and cruise.
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Chip '51 Chevy 3600 5 window C4 Vette front/rear suspension & drive train full Rusto-Mod '92 GMC Sonoma GT VIN #0015 '91 GMC Sonoma GT extended cab 1 of 1 |
06-16-2022, 10:04 AM | #15 |
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Re: Cab mount question
I know this sounds really 'Canadian', but I have seen people use hockey pucks for body mounts
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https://67-72chevytrucks.com/vboard/...=797726&page=3http://https://67-72chevytrucks.com/...=797726&page=3 51 Chev 5 window on S10 with SBC 1958 Pontiac Wagon build https://67-72chevytrucks.com/vboard/...d.php?t=849781 |
06-17-2022, 02:05 AM | #16 | |
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Re: Cab mount question
Quote:
Most of us don't need the flex and give that the shackles provide because we just are not going to intentionally go bounding off through a rough pasture with our trucks as they were intended to do when they were built. I may have to grade my driveway just to get in and out as I have some real nice tank traps in the driveway that keep some individuals out .
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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