headers run into my trans crossmember??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

freebird0025 · 12-13-2008, 02:36 PM

today i installed long tube headers on my 82 swb and before I realized it, the opening 3" flange is literally inches behind my trans cross-member. It's totally obstructed from putting my reducers and turn-downs on. I need to get enough clearance above or below the openings in order to allow me to install my turn-downs. What would anyone suggest? Anyone have the same problem?

freebird0025 · 12-13-2008, 08:59 PM

today i installed long tube headers on my 82 swb and before I realized it, the opening 3" flange is literally inches behind my trans cross-member. It's totally obstructed from putting my reducers and turn-downs on. I need to get enough clearance above or below the openings in order to allow me to install my turn-downs. What would anyone suggest? Anyone have the same problem?

gchemist · 12-13-2008, 09:29 PM

I had a custom tranny crossmember made. I had it made for dual exhaust. Check my webshots. I can access the exact picture from this computer.
I use 3/4 length Chevelle headers. Older and heavier trucks had a factory dual hump crossmember. Check under 3/4 and 1 ton early model trucks.

Longhorn Man · 12-13-2008, 11:08 PM

freebird... I'm going to move this one to the 73 - 87 board. While it isn't so much posted in the wrong section, it is more aplication specific to the 73 - 87 trucks. I'm sure the guys over there will have recomendations on a replacemnt cross member, or possibly, another brand of headers.

smashingchuck · 12-14-2008, 02:05 PM

I pie cut the reducer and aimed it below the crossmember back when my 78 had long tube headers on it. On my 87 I had to cut the header just in front of the collector flange and weld it back on pointing in a different direction.

gchemist · 12-17-2008, 01:09 AM

Here is side picture of my truck. You have to look very carefully to see the driverside headers below the frame rail.

piecesparts · 12-17-2008, 04:33 AM

What brand of headers and what type of tranny do you have? For the most part the headers for these trucks will give you enough room to put the adapters on and make your transition around the tranny and the cross member.

gchemist · 12-17-2008, 02:26 PM

Here is a picture of the lowest part of my exhaust system. The Chevelle header is nicely tucked up into the body.

smashingchuck · 12-17-2008, 03:03 PM

where you able to make that bend without going lower than the frame? Those headers look similar to where mine dump and it is going to be tight there since my truck lays flat out.

MrBeast · 12-17-2008, 04:05 PM

Too bad you dont live in texas, I would offer to help you weld a new one up.

rigon4 · 12-17-2008, 05:25 PM

i used these form jegs in my 81 2wd blazer 350/350 combo with long tubes. part # 500-18701

12-13-2008, 02:36 PM	#1
freebird0025 Registered User Join Date: Dec 2008 Location: monroe, mi Posts: 3	headers run into my trans crossmember??? today i installed long tube headers on my 82 swb and before I realized it, the opening 3" flange is literally inches behind my trans cross-member. It's totally obstructed from putting my reducers and turn-downs on. I need to get enough clearance above or below the openings in order to allow me to install my turn-downs. What would anyone suggest? Anyone have the same problem? Last edited by freebird0025; 12-13-2008 at 02:37 PM.

12-13-2008, 08:59 PM	#2
freebird0025 Registered User Join Date: Dec 2008 Location: monroe, mi Posts: 3	help! headers run into my crossmember... today i installed long tube headers on my 82 swb and before I realized it, the opening 3" flange is literally inches behind my trans cross-member. It's totally obstructed from putting my reducers and turn-downs on. I need to get enough clearance above or below the openings in order to allow me to install my turn-downs. What would anyone suggest? Anyone have the same problem?

12-13-2008, 09:29 PM	#3
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: headers run into my trans crossmember??? I had a custom tranny crossmember made. I had it made for dual exhaust. Check my webshots. I can access the exact picture from this computer. I use 3/4 length Chevelle headers. Older and heavier trucks had a factory dual hump crossmember. Check under 3/4 and 1 ton early model trucks. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

12-13-2008, 11:08 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: help! headers run into my crossmember... freebird... I'm going to move this one to the 73 - 87 board. While it isn't so much posted in the wrong section, it is more aplication specific to the 73 - 87 trucks. I'm sure the guys over there will have recomendations on a replacemnt cross member, or possibly, another brand of headers.

12-14-2008, 02:05 PM	#5
smashingchuck It'd be alot cooler if you did Join Date: May 2003 Location: Three Rivers, MI Posts: 2,345	Re: headers run into my trans crossmember??? I pie cut the reducer and aimed it below the crossmember back when my 78 had long tube headers on it. On my 87 I had to cut the header just in front of the collector flange and weld it back on pointing in a different direction. __________________ 78 Build Thread 4Runner Build Last edited by smashingchuck; 12-14-2008 at 02:07 PM.

12-17-2008, 01:09 AM	#6
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: headers run into my trans crossmember??? Here is side picture of my truck. You have to look very carefully to see the driverside headers below the frame rail. Attached Images __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos Last edited by gchemist; 12-17-2008 at 02:22 PM.

12-17-2008, 04:33 AM	#7
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: headers run into my trans crossmember??? What brand of headers and what type of tranny do you have? For the most part the headers for these trucks will give you enough room to put the adapters on and make your transition around the tranny and the cross member.

12-17-2008, 02:26 PM	#8
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: headers run into my trans crossmember??? Here is a picture of the lowest part of my exhaust system. The Chevelle header is nicely tucked up into the body.

12-17-2008, 03:03 PM	#9
smashingchuck It'd be alot cooler if you did Join Date: May 2003 Location: Three Rivers, MI Posts: 2,345	Re: headers run into my trans crossmember??? where you able to make that bend without going lower than the frame? Those headers look similar to where mine dump and it is going to be tight there since my truck lays flat out. __________________ 78 Build Thread 4Runner Build

12-17-2008, 04:05 PM	#10
MrBeast high-Tech Red Neck Join Date: Feb 2008 Location: Livingston, MT/On my boat WA/BC/AK Posts: 2,294	Re: headers run into my trans crossmember??? Too bad you dont live in texas, I would offer to help you weld a new one up. __________________ "He used to be a pretty nice feller, now he's a welder!"

12-17-2008, 05:25 PM	#11
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Re: headers run into my trans crossmember??? i used these form jegs in my 81 2wd blazer 350/350 combo with long tubes. part # 500-18701 Attached Images __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

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