Experienced advice please.Those who done it. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

boomer · 12-03-2006, 01:35 PM

I was told by someone on the board that before i z'd the front frame rails i should run the 2by4 box tubing first before the z.. Why would that be???? Is there a reason for it. I forgot if he infact told me? Maybe to make sure that i z'd it eneough after looking at how the truck is sitting with just the frame rails cut and airred out?? Could that be why?

Also he had said it doesnt make any sense to weld in the box tubing to the bottom of the frame rails and chop the top. Then you have to relocate your cab mounts.

Why not put the box tubing into the upper part of the frame rails and chop the bottoms off. No relocating of the cab mounts. Or by doing it this way will this create problems.

Can anyone shed the light upon these 2 questions as to what they did. Mines an 87 bagged gmc.

LuckyHG · 12-04-2006, 08:47 AM

Im not quite sure what your asking in the first question. AS far as the second part, if you chop off the bottom of the rails you wont have to move your cab mounts but your front suspension will still be at the same level. It would sort of be hanging below the truck. Once again im not sure what your workin on if your just z'ng the frame or doing a whole new frame. If your just doing the z you shouldnt have to put any 2x4 in. Just make sure you plate at the z and make it as strong as you can.

pharcyde05 · 12-05-2006, 06:41 PM

depending on what you are looking for as a final product zing the frame and channeling the frame are 2 seprat procedures and you can do either one or bolth if you like
the purpose of the Z is to raise the saddle under the eng and to bring up lower arms for clearance by doing this and adding drop spindels you can lay out on the frame rails and your pinch will sit around .5 to 1 inch of ground now comes the reason fro channelig the frame if you want to get that rocker to the ground you have to get rid of the bottom inch of the frame by placing the tubing at top of frame and cutting off bottom will get you down there you have to know what your plans are whenyou start cause the way you mount your bags will depend on it cause if you want that extra inch you have to make sure the bag dosent colapse compleatly before you reach the ground

12-03-2006, 01:35 PM	#1
boomer Registered User Join Date: Sep 2006 Location: CANADA Posts: 62	Experienced advice please.Those who done it. I was told by someone on the board that before i z'd the front frame rails i should run the 2by4 box tubing first before the z.. Why would that be???? Is there a reason for it. I forgot if he infact told me? Maybe to make sure that i z'd it eneough after looking at how the truck is sitting with just the frame rails cut and airred out?? Could that be why? Also he had said it doesnt make any sense to weld in the box tubing to the bottom of the frame rails and chop the top. Then you have to relocate your cab mounts. Why not put the box tubing into the upper part of the frame rails and chop the bottoms off. No relocating of the cab mounts. Or by doing it this way will this create problems. Can anyone shed the light upon these 2 questions as to what they did. Mines an 87 bagged gmc.

12-04-2006, 08:47 AM	#2
LuckyHG Registered User Join Date: Nov 2005 Location: So. Md Posts: 43	Re: Experienced advice please.Those who done it. Im not quite sure what your asking in the first question. AS far as the second part, if you chop off the bottom of the rails you wont have to move your cab mounts but your front suspension will still be at the same level. It would sort of be hanging below the truck. Once again im not sure what your workin on if your just z'ng the frame or doing a whole new frame. If your just doing the z you shouldnt have to put any 2x4 in. Just make sure you plate at the z and make it as strong as you can. __________________ 71' 2wd sub <------parts donations accepted 99' 4wd big block sub 92' K2500 ext cab Lb 95' S-10 sfbd, hydro's, etc. 02' Ram bagged etc. 83' International School bus...flat black with alot of room www.Homegrowncustoms.com

12-05-2006, 06:41 PM	#3
pharcyde05 Senior Member Join Date: Mar 2006 Location: modesto CA Posts: 239	Re: Experienced advice please.Those who done it. depending on what you are looking for as a final product zing the frame and channeling the frame are 2 seprat procedures and you can do either one or bolth if you like the purpose of the Z is to raise the saddle under the eng and to bring up lower arms for clearance by doing this and adding drop spindels you can lay out on the frame rails and your pinch will sit around .5 to 1 inch of ground now comes the reason fro channelig the frame if you want to get that rocker to the ground you have to get rid of the bottom inch of the frame by placing the tubing at top of frame and cutting off bottom will get you down there you have to know what your plans are whenyou start cause the way you mount your bags will depend on it cause if you want that extra inch you have to make sure the bag dosent colapse compleatly before you reach the ground __________________ http://www.cardomain.com/ride/2461088



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