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Post by car185 on Feb 3, 2017 20:07:24 GMT -5
Ok guys got a 77 grand prix for stock show. Can anyone pm me some tips on how to keep frame from bending in front of a arm or tips on how to slow it from happening Soft bumper, flat bumper, and hit square...
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Post by w4114c3 on Jun 26, 2017 17:15:25 GMT -5
I posted my 76 monte earlier that bent on the passenger side in front of a arms. Ended up cutting horns off and had a set of 98 vic horns. Ended up rehorning with those we will see how well it all holds up in about a month.
Was gunna post few photos but said forum exceeded attachment space.
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Post by GRIMREAPER on Feb 16, 2018 19:47:54 GMT -5
On a 74 Grand Prix I have a mopar flat front bumper I am going to be using on the front, should I use the stock gm shocks to mount the bumper to any suggestions on how to mount it properly? Thanks!!
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Post by cheezwhiz31 on Feb 19, 2018 15:24:13 GMT -5
Bumper mounting Rules needed!!!
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Post by GRIMREAPER on Feb 22, 2018 20:19:05 GMT -5
.BUMPERS: You may weld or re-bolt the bumper to the bumper mount (bumper must remain at stock location) do not mount bumper on top of frame. You may weld shock bumper or use a ⅜”X4”X10” plate to weld from bumper to frame on 1 side of each frame rail. A ⅜” chain can be connected to the bumper (welded or bolted) and must be bolted to the frame, one layer of frame only. Rear bumper must remain any stock production bumper. FRONT BUMPER: Factory bumpers are allowed to be loaded, seam welded and reinforced behind the factory shell. No altering of bumper from original shape. A Homemade Bumper may be used. Maximum height 8” minimum 4”must be rectangle or square with open ends. ⅜”x6”x6” mount to frame. No jagged edges allowed. Point can be made but must not exceed 8” from rear of bumper and must be minimum of 24” wide centered on bumper. Example: if 8”x8” square tubing no point will be allowed.
sorry about that guys any help would be greatly appreciated also considering loading the original front bumper
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Post by Junkyarddog84 on Feb 23, 2018 13:33:00 GMT -5
I like using homemade bumpers, strong and built how you need them
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Post by blackNblue82 on Feb 23, 2018 16:17:59 GMT -5
.BUMPERS: You may weld or re-bolt the bumper to the bumper mount (bumper must remain at stock location) do not mount bumper on top of frame. You may weld shock bumper or use a ⅜”X4”X10” plate to weld from bumper to frame on 1 side of each frame rail. A ⅜” chain can be connected to the bumper (welded or bolted) and must be bolted to the frame, one layer of frame only. Rear bumper must remain any stock production bumper. FRONT BUMPER: Factory bumpers are allowed to be loaded, seam welded and reinforced behind the factory shell. No altering of bumper from original shape. A Homemade Bumper may be used. Maximum height 8” minimum 4”must be rectangle or square with open ends. ⅜”x6”x6” mount to frame. No jagged edges allowed. Point can be made but must not exceed 8” from rear of bumper and must be minimum of 24” wide centered on bumper. Example: if 8”x8” square tubing no point will be allowed. sorry about that guys any help would be greatly appreciated also considering loading the original front bumper I read it with the assumption that it meant to say weld bumper shock or use a 3/8 etc. plate. If that's the case I would use mopar shocks and extend them as far as you can, it puts a 10" restriction on the plate but not the shocks. This is how I read the rules, depending on the promoter would determine if its allowed or not.
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Post by derby2racer on Mar 1, 2018 20:48:43 GMT -5
.BUMPERS: You may weld or re-bolt the bumper to the bumper mount (bumper must remain at stock location) do not mount bumper on top of frame. You may weld shock bumper or use a ⅜”X4”X10” plate to weld from bumper to frame on 1 side of each frame rail. A ⅜” chain can be connected to the bumper (welded or bolted) and must be bolted to the frame, one layer of frame only. Rear bumper must remain any stock production bumper. FRONT BUMPER: Factory bumpers are allowed to be loaded, seam welded and reinforced behind the factory shell. No altering of bumper from original shape. A Homemade Bumper may be used. Maximum height 8” minimum 4”must be rectangle or square with open ends. ⅜”x6”x6” mount to frame. No jagged edges allowed. Point can be made but must not exceed 8” from rear of bumper and must be minimum of 24” wide centered on bumper. Example: if 8”x8” square tubing no point will be allowed. sorry about that guys any help would be greatly appreciated also considering loading the original front bumper I read it with the assumption that it meant to say weld bumper shock or use a 3/8 etc. plate. If that's the case I would use mopar shocks and extend them as far as you can, it puts a 10" restriction on the plate but not the shocks. This is how I read the rules, depending on the promoter would determine if its allowed or not. I read it the same way. Plate size is restricted, but not factory style bumper bracket/shock.
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Post by daron0311 on Apr 18, 2018 9:45:00 GMT -5
I have been running vics for a few years now and have had great success, but recently acquired a 75 monte. Initially I just got it for the bumpers but I think I may build it to run. If rules are no issue, would you midsize gm guys think I will benefit from a 98-02 vic stub up front or even a full frame swap? I'm not asking for someone to hold my hand and tell me how to do it, just want input from those that have experienced building both cars and maybe have vic stubbed one before. I will more than likely be leafing the rear as well if that changes anything, as long as the m.c. gives me the necessary time off. My only reason for asking is, after reading through 400 pages in here, these frames don't seem as tough as they look. Thanks in advance yall
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Post by STROMI 121 on Apr 18, 2018 10:38:34 GMT -5
Personally, I have never done it or seen it done but I like the idea. The monte frames aren't horrible except for a arms forward. I think those cars would definitely benefit from a vic stub. I have no idea where the best location to stub it would be. However, if you end up doing it. Id love to see pictures and how it turned out.
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Post by daron0311 on Apr 18, 2018 10:49:05 GMT -5
Personally, I have never done it or seen it done but I like the idea. The monte frames aren't horrible except for a arms forward. I think those cars would definitely benefit from a vic stub. I have no idea where the best location to stub it would be. However, if you end up doing it. Id love to see pictures and how it turned out. I'm really thinking about leaving the gm back section and just going with vic rails all the way forward so I can get rid of the weak side rails while I'm at it too. In your experience, would you say the rear humps are more prone to blowing out than a vic or better? I've never had one blow out on any of my vics but I always prebend and run a soft bumper on the back and tend to drive forward 80% of the time
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Post by STROMI 121 on Apr 18, 2018 11:35:29 GMT -5
The rear rails have a funny shape and are matched to the trunk floor. Id probably leave the rear like you said just to make it easier especially since you are leafing it anyways. But Im only guessing here as I have never attempted it. Hopefully someone who has done something similar will chime in.
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Post by dean88 on Apr 18, 2018 11:44:08 GMT -5
I've only ran a couple of them bone stock, but I've never had any problems out of the humps, just the front frame rail in front of the steering gbox.
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Post by Luke Wells on Apr 18, 2018 13:44:07 GMT -5
As stated the humps are fine, and yes the rear rails make a strange bend towards the bumper.
I almost think if you could just make the vic horns work on it, it would hold up nice.
If you do want to use the vic full box belly rails then grind the welds off the monte frame in front of the axle where the hump meets the belly rails, and slide the vic's in the. They go together pretty easy with a little massaging.
You will have to use a vic clip because after you line up the firewall mounts the monte clip is too long.
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Post by daron0311 on Apr 18, 2018 13:55:27 GMT -5
As stated the humps are fine, and yes the rear rails make a strange bend towards the bumper. I almost think if you could just make the vic horns work on it, it would hold up nice. If you do want to use the vic full box belly rails then grind the welds off the monte frame in front of the axle where the hump meets the belly rails, and slide the vic's in the. They go together pretty easy with a little massaging. You will have to use a vic clip because after you line up the firewall mounts the monte clip is too long. That's pretty much spot on with what I wanted to try. I'm gonna try and shorten the nose of the monte before using a vic clip but I'm glad to hear someone else has done it. How did yours hold up?
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