Question for frame gurus. OR How smart are you? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Primered_69 · 02-01-2005, 12:49 AM

Background:

I have a 1969 lwb frame with leaf springs in which I relocated the gas tank into. There is a crossmember before and right after the tank. The first crossmember has a bracket to hold the rear brake line.

I also have a 72 frame with leaf springs I am swapping over to. However there is no forward crossmember in front of where the gas tank will be. Instead there is just a small tab where the brake line attaches to the frame.

Question for the experts:

Do I need to swap out the crossmember from the 69 frame to the 72 frame to still be able to use it with the blazer tank or is this unnecessary? Will the Blazer tank slide w/o the other crossmember there in case of an accident? I already took out the spare tire thingymijiggy.

farmaller · 02-01-2005, 06:08 AM

If there is no cross member in front of the fuel tank what are you going to mount the tank straps to???

ebfabman · 02-01-2005, 11:14 AM

The blazer tank straps go from frame rail to frame rail.

**kwmech** · 02-01-2005, 11:25 AM

If the frame did not have the x-member in it originally I wouldn't worry about it, however if you are take the member out of the 69 and bolt it in the other.

farmaller · 02-01-2005, 05:42 PM

I learned something new, I didn't know the blazer tank straps went frame rail to frame rail.

mocwon · 02-01-2005, 11:54 PM

I swapped my long bed 72 rear leaf setup over to a 69 short bed frame with trailing arms and put the 72 cross member in front of the rear mounted gas tank, made by Fuel Cell Guy. For some reason the 69 frame didn't have the front cross member. It may be that short beds didn't have the cross member but I'm not sure. My feeling is that rigidity is gained by having the cross member.

02-01-2005, 12:49 AM	#1
Primered_69 Registered User Join Date: Sep 2002 Location: Fort Worth Posts: 1,409	Question for frame gurus. OR How smart are you? Background: I have a 1969 lwb frame with leaf springs in which I relocated the gas tank into. There is a crossmember before and right after the tank. The first crossmember has a bracket to hold the rear brake line. I also have a 72 frame with leaf springs I am swapping over to. However there is no forward crossmember in front of where the gas tank will be. Instead there is just a small tab where the brake line attaches to the frame. Question for the experts: Do I need to swap out the crossmember from the 69 frame to the 72 frame to still be able to use it with the blazer tank or is this unnecessary? Will the Blazer tank slide w/o the other crossmember there in case of an accident? I already took out the spare tire thingymijiggy. __________________ 1969 Chevy LWB - with shaved handles; 3 1/2 front/ 5 1/2 rear drop; (waiting to be put back together)

02-01-2005, 06:08 AM	#2
farmaller Registered User Join Date: Nov 2004 Location: Rudolph, WI. Posts: 66	If there is no cross member in front of the fuel tank what are you going to mount the tank straps to??? __________________ Currently helping a Friend build a 71 Custom Camper into his dream truck Guess that makes me the Middle man since he asks questions and I search for the answers

02-01-2005, 05:42 PM	#5
farmaller Registered User Join Date: Nov 2004 Location: Rudolph, WI. Posts: 66	I learned something new, I didn't know the blazer tank straps went frame rail to frame rail. __________________ Currently helping a Friend build a 71 Custom Camper into his dream truck Guess that makes me the Middle man since he asks questions and I search for the answers

02-01-2005, 11:54 PM	#6
mocwon Keep On Truckin' Join Date: Mar 2003 Location: Buda, Texas Posts: 1,354	I swapped my long bed 72 rear leaf setup over to a 69 short bed frame with trailing arms and put the 72 cross member in front of the rear mounted gas tank, made by Fuel Cell Guy. For some reason the 69 frame didn't have the front cross member. It may be that short beds didn't have the cross member but I'm not sure. My feeling is that rigidity is gained by having the cross member. __________________ Just Passin' Thru Some projects are like herding cats; others are like putting out fires; this one was like herding cats on fire.....

02-01-2005, 11:14 AM	#3
ebfabman Registered User Join Date: Nov 2001 Location: Concord, NC Posts: 2,488	The blazer tank straps go from frame rail to frame rail.

02-01-2005, 11:25 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	If the frame did not have the x-member in it originally I wouldn't worry about it, however if you are take the member out of the 69 and bolt it in the other.



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