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#1 |
saving one more
Join Date: Sep 2005
Location: Pryor Creek, Oklahoma
Posts: 3,066
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Another exhaust question
I want to tuck the exhaust on my truck as high as possible. I have a 72 LWB with trailing arms. I plan on lowering the truck soon. I am wanting to cut 3" holes in the trailing arm crossmember so that I can run 2 1/2 " exhaust over the trans crossmember and through the trailing arm crossmember. I have already redone the shift linkage, so that would not be in the way.
Is this okay to do, or will I weaken the trailig arm crossmember too much? Could I weld some plate in and strengthen this area, or possibly box the crossmember? Any input is greatly appreciated. I am also looking for headers that will tuck as close to the floorboards as possible. I am tired of looking at the exhaust system hanging down.
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72 Chevy longbed - now for parts 69 Chevy short fleet - needing some love 70 RS Camaro - needing more love driver - 96 GMC X-cab |
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#2 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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That's a common technique for get the exhaust higher. I usually just cut the holes in the crossmember and be done with it. Some other guys like to cut the holes then plate it and reinforce it like you suggested. I've never seen or heard of any problems either way.
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I'm on the Instagram- @Gearhead_Kevin |
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#3 |
Life is a gamble
Join Date: Oct 2003
Location: Lee's Summit, MO
Posts: 796
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Here is mine
This is how my exhaust is routed:
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1970 Orange CST C-10 w/350, posi, Longbed The torpid artist seeks inspiration at any cost, by virtue or by vice, by friend or by fiend, by prayer or by wine. -- Ralph Waldo Emerson |
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#4 |
Registered User
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,891
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I'd put a short piece of pipe in the hole and weld it in then run the exhaust through the pipe!
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Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! |
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#5 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Dynomax Chevelle shorty's will fit. But they have small primarys 1 1/2" o 2 1/2" collector. They should be fine if you have a mild 350. I went with the heddman(sp) Chevelle shortys they are 1 5/8 to 3" I had to use North West Auto fabs motor mounts because they hit the stock motor mounts. Sure you could hack them out to clear but thats not good enough for me.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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