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C3 Fuel, Emission Control, and Exhaust Systems

Header woes (1/3)
 6/16/17 8:23pm
new77guy
Former Member

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henderson, NV - USA

Vette(s):
1977 Corvette l48 Custom


Joined: 2/7/2004
Posts: 715

Hello everyone I have a 1977 corvette l48. Factory 350 block that wa las stroked to a 383. I have edlebrock aluminum 6073 heads. I have after Marley motor mounts and transmission mount. I also have a 700r4 transmission with custom crossmember. I also have factory a/c, p/s, alternator and water pump. The steering system I factory and I have a v b and p full front and rear monospring setup. I am not using and emissions equipment at all. I purchased a set of headman 68308 headers a long time ago. During the install the headers have hit the idler arm, oil filter, and fender wall. The passenger side is 2" back and can't go anymore forward. The installer also says if they got right in position hey may not clear the trans. The car is lowered because of the monospring I don't have the time nor money to play around with headers. I don't want to lose a ridiculous amount of power and looks and head back to an easy install manifold setup. I also do not want to lose the use of factory a/c and p/s brackets. I called pertronics on California, the suggested the dougs d350 header. Stops at corvette year 74. Will it still work without emissions equipment? And do I have to remove the a/c bracket? Is there any brand and model header that is modestly priced that any of you aware of that will install just fine without issues ? Thank you !

|UPDATED|6/16/2017 5:23:59 PM (AZT)|/UPDATED|


______________
-LOUIE

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Re: Header woes (2/3)
 6/19/17 2:22am
new77guy
Former Member

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henderson, NV - USA

Vette(s):
1977 Corvette l48 Custom


Joined: 2/7/2004
Posts: 715

No one has any ideas?????

______________
-LOUIE

Re: Header woes (3/3)
 6/19/17 2:16pm
stingrayjim jrLifetime Member
Lifetime Member
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SHELBYVILLE, TN - USA

Vette(s):
1976 L48 auto

1978 L82 4speed

1994 LT1 6speed


Joined: 7/5/2002
Posts: 3942

Headers are usually always a pain.... i picked up a set of hookers i think, second hand at a swap meet in bowling green some 20 years ago it seems, at one of the NCM functions.... 35 dollars, installed them on dad's 76... the exhaust is straight piped so emissions isn't a concern.  I can't see how the A/C bracket would be a problem, it shouldn't attach to the stock manifold, but i could be wrong..... biggest issue we had getting them installed was that on the driver side(if i remember correctly) we had to remove the motor mount bolt and jack the engine up a little to wiggle it down in there...  the only other issue is if you need to pull your starter off, you will most likely have to remove the header or at very least loosen up everything to remove / install the starter....

given the little room under the hood of these c3's... do make sure the headers you have are vehicle specific...looked up your part number and what few reviews i saw, they were also having problems fitting them on.... so there might be a manufacturing problem with the Heidmans....

As for headers for a '74 for your car,   they "should" work.... if they were previously installed without any issues, then you "should be" ok....  realize the quotes, as you milage may vary.  

Looking up Dougs D350 headers, they seem to have a lot better reviews.... best reason i can think of why they stop at 1974 is for emissions... most places that have emission testings don't like/approve exhaust modifications on vehicles prior to 1975-ish.  If you are in an  area that doesn't require emission/inspections then probably no worries... 

oh, copper gaskets, i highly recommend them... major pain having to replace the fiber/paper gaskets every year or sooner.... :)
hope that helps a little....