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Topic: Header clearance quest.

in Forum: C3 Fuel, Emission Control, and Exhaust Systems

Header clearance quest.

Posted: 4/15/08 5:05am Message 1 of 3
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York, SC - USA
Joined: 9/4/2005
Posts: 534
Vette(s): 1974 mille miglia red with oxblood interior 355ci, 320hp
Hi guys. 
i'm almost done with a motor swap and i'm wanting to put some shorty (blockhugger) headers on it.  (it's a 1974).

well, i dry fit the driver's side header and the second tube hits the steering box.  is this common to have to "ding" the header tube there?  i thought blockhugger headers were made to alleviate that.

does anyone have any experience in using the shorty headers?
and did you need to dent the tube?
maybe i need to use a particular brand?

thanks guys.

jeff
Hmel '742008-04-15 05:24:56


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Header clearance quest.

Posted: 4/15/08 5:11am Message 2 of 3
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Make sure all of your mounts(engine/trans) are in good shape first. Most of the headers for Shark cars do come close, or actually touch the steering box, no matter who makes them...
You may have to "modify" the tube to fit, but check your mounts first, and replace if needed.
I think there are some pics posted of others here that have the same problem, and how close the headers fit...don't remember which thread, but I think the one from DaveM, when he installed the new engine in his '82, may have some pics...


Joel Adams
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Header clearance quest.

Posted: 4/15/08 6:16am Message 3 of 3
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
On my 72 with a 454, I have Heddman Headers and they just barely touched the steering box. I had to "massage" the second tube just a little bit around the box. I have heard that this is very common, and I had already taken joel's advice on changing my tranny and motor mounts because of a previous problem with my fan shroud being to far over toward the passenger side. So I know my mounts were OK.
Lonnie 



in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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