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12-13-2006, 11:01 PM | #1 |
On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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HERE'S what's different about '85-'86-'87 trucks (pics)
In response to this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=217743
I bought those stainless headers off ebay that were supposedly for 73-84 only since it seemed there shouldn't be a difference in 85-87 trucks. They gave no explanation why they wouldn't fit 85 & up. Once I got the headers, I saw they were Wysco brand so I logged on to their website to check it out. Their explanation was that the #3 primary interfered with the control arm on 85 & up trucks but fit fine on 73-84. I test fitted the driver's side header tonight to see for myself, and sure enough...... The primary isn't actually touching the control arm, but it's about as close as you can get without touching. They're EXTREMELY nice headers otherwise. They don't interfere with my clutch linkage or anything else on the truck and spark plug clearance is perfect (which isn't the case on my current longtubes) so I still think they were a steal for the price. I'm going to go ahead and keep them and try to muster up the guts to dimple that pretty primary where the interference is. How much clearance do you think I need???
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD |
12-14-2006, 12:21 AM | #2 |
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Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
That's interesting indeed. Why would they make them like that? Seems they would loose out on alot of sales. Actually, it doesn't look to bad.
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
12-14-2006, 12:23 AM | #3 |
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Join Date: Feb 2003
Location: Midwest City, OK
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
btw, can you post some under-truck pics? I'd like to see how low they hang. Thanks!
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Robert Current: 1986 SWB Silverado 4.3 / TH400 Past: 1985 SWB Silverado 305 / TH350 - sold 1995 1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007 |
12-14-2006, 10:14 AM | #4 |
On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
I've already got my old headers back on, but the new ones tuck up probably 3" higher than the ones I have on there now!! If you could have both the new and old mounted at the same time, the new collector would sit right on top of the old one----if that makes any sense to ya . Definitely tons more clearance. I can post a pic of my current clearance if that'll give you a better idea.
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 12-14-2006 at 10:21 AM. |
12-14-2006, 03:34 PM | #5 |
Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
Yes, we would like to see more pictures. Thanks for the info.
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
12-14-2006, 09:01 PM | #6 |
On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
Ok, here's a few pictures of the headers that are currently on the truck, along with a lovely overlay in yellow (no laughing!!) of where the new header sits. You can see that my current headers are much lower, and I had to make a bend in the exhaust to route the pipe over the trans x-member. With the new headers, I can eliminate most of that bend and take a near-straight shot over the x-member. Anybody have a recommendation on how much clearance you think is needed around the control arm with the new headers?
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD |
12-14-2006, 09:48 PM | #7 |
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Join Date: Jul 2003
Location: Indianapolis, IN
Posts: 1,277
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
I would try a small dimple in the offending tube and drive it a while and see what happens. I would think with good engine mounts the engine movement would be minimal. I know when I have had exhaust clearance issues, they were easy to hear.
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12-15-2006, 09:56 AM | #8 |
Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
swb85, no laughing here. I know I could not do any better. Man, it is higher. I have a set and will be installing after I get my truck back from the body shop later. Appreciate the information. I will put dimples in the offending tubes befor install. But these are really good looking headers. You can not beat the price. They also came with everthing you would need to install except the tools of corse. But I do not see a big deal fixing the problem.
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
12-16-2006, 10:06 PM | #9 |
Account Suspended
Join Date: Aug 2006
Location: vacaville ca, because it as far from indy as i can be
Posts: 775
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
why smash the pipe when you could just slip a shim under the motor mount base plate?
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12-18-2006, 04:07 PM | #10 |
Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
Would that not cause problems?
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
12-29-2006, 10:18 AM | #11 |
Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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Re: HERE'S what's different about '85-'86-'87 trucks (pics)
ttt
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
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