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 !
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....
StingrayJim NCM Lifetime Member #1936
Stingray's '76 StingrayJr's '78 Lil Red '94 (click each one to see a bigger version)
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2019, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982