Another header clearance question - Nova Tech
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  #1  
Old Aug 28th, 06, 12:07 AM
jcjacobi jcjacobi is offline
 
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Default Another header clearance question

I purchased some Hedman HTC long tube headers for my '70 Nova (396 4spd, p/s). Even though I called Hedman beforehand to verify the fit, I've run into a clearance problem with the driver's side header. I removed the motor mount bolt and raised the engine slightly to install the header, but the steering box won't provide enough clearance to lower the motor back all the way back into the mount. It looks like I need another 1/2". Is it possible (or even recommended) to add spacers to the motor mounts? Hedman said that I must have BBC mounts installed - are the BB's larger or smaller than the SB mounts? How do I tell which one is installed? I've heard that some speed shops "dimple" the headers to make them fit - and I really don't want to do as it will void the warranty.

Thanks,
Jonathan
(Hoping that the left side will clear the starter motor!)
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  #2  
Old Aug 28th, 06, 06:48 AM
TDWZ28 TDWZ28 is offline
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Default Re: Another header clearance question

The BB frame stands are different than the SB ones. The BB one will raise the engine on the drivers side and will also offset the engine to the pass side of the car. This also moves the trans mount over. Did the car have a SB in it? If so, chances are good you have the SB stands and will need the BB ones.
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  #3  
Old Aug 28th, 06, 09:59 AM
jcjacobi jcjacobi is offline
 
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Default Re: Another header clearance question

The car was originally equipped with the 396/402, however the numbers aren't matching so I have no idea what mounts are in the car now. Is there an accurate way to determine which one I have before I start ordering replacement parts?
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  #4  
Old Aug 28th, 06, 12:02 PM
Philip Philip is offline
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Default Re: Another header clearance question

If you still have the BB frame stands and crossmember the engine will sit about 1" offcenter towards the passenger side. Measure from each fender to the center of the carburator to check the engine. The crossmember is more obvious when looking at it.
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  #5  
Old Aug 28th, 06, 02:07 PM
jcjacobi jcjacobi is offline
 
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Default Re: Another header clearance question

one more question for clarification -
I just spoke with Ground Up - the salesrep said that I needed "frame brackets", not the mounts that go on the block. Are we talking about the same thing? The pn# they gave me was ACE-9412.
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  #6  
Old Aug 28th, 06, 03:21 PM
498Ron 498Ron is offline
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Default Re: Another header clearance question

The correct frame stands are what you need. Often confused with the mounts.

With SB frame stands in the car, headers hit the steering box.

Ron
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  #7  
Old Aug 28th, 06, 07:10 PM
TDWZ28 TDWZ28 is offline
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Default Re: Another header clearance question

JC...There are quite a few threads at www.stevesnovasite.com about the frame stands. There are some pictures with measurements, if I remember correctly. I am stupid witha computer or I would make a link. Go there and do a search.
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  #8  
Old Aug 28th, 06, 07:48 PM
jcjacobi jcjacobi is offline
 
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Default Re: Another header clearance question

Thanks guys for all the input. This may not be a politically correct question (noting the banner at the top right corner of this page), but are there sources other than Ground Up or junk yards for the frame mounts? I'd like to spend less than $75 if there are other options.
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  #9  
Old Aug 28th, 06, 07:51 PM
Al Al is offline
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Default Re: Another header clearance question

You can always try a free wanted ad here on the site. Somebody might have a set kicking around.

https://www.novas.net/classifieds/
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  #10  
Old Aug 28th, 06, 09:18 PM
Big Dave Big Dave is offline
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Cool Re: Another header clearance question

GM no longer makes the part (obsolete) so the only source for new parts is the repop people. I wish you luck finding a first gen Camaro or BBC '68-'71 Nova in a wrecking yard as those are the only donors that will have the parts you need (back in the early seventies and late sixties Olds, Buick, and Pontiac were still making their own motors for their variants of the Nova, so there won't be a BBC in them unless some transplanted one.

This is another case of supply and demand determining market price.


Big Dave
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  #11  
Old Sep 18th, 06, 04:26 PM
jcjacobi jcjacobi is offline
 
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Default Re: Another header clearance question

Update: Well, I replaced the small block frame brackets with the big block version - unfortunately, there still was not enough clearance. (I even shimmed the driver's side up by a quarter inch.) I just got off the phone with Hedman for a third time... now they're telling me that the Elite Headers will not fit my car with power steering. Great.

So it's back to Summit to try on another pair.
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  #12  
Old Sep 19th, 06, 11:13 PM
a2race a2race is offline
 
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Default Re: Another header clearance question

Quote:
Originally Posted by jcjacobi View Post
Update: Well, I replaced the small block frame brackets with the big block version - unfortunately, there still was not enough clearance. (I even shimmed the driver's side up by a quarter inch.) I just got off the phone with Hedman for a third time... now they're telling me that the Elite Headers will not fit my car with power steering. Great.

So it's back to Summit to try on another pair.
so do you NEED power steering??? if not, i have a manual box with pitman arm that is in VGC that i pulled from my 69 to put PS on it.....would you be interested????
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  #13  
Old Sep 20th, 06, 01:02 AM
jcjacobi jcjacobi is offline
 
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Default Re: Another header clearance question

Quote:
Originally Posted by a2race View Post
so do you NEED power steering??? if not, i have a manual box with pitman arm that is in VGC that i pulled from my 69 to put PS on it.....would you be interested????
Power steering is definitely my preference, but I'll keep your offer in mind if the circumstances change. Thanks.
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  #14  
Old Mar 13th, 07, 09:47 PM
maxxsand maxxsand is offline
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Default Re: Another header clearance question

i am installing a bb in my 73 nova go to www.luttyschevy.com
the part # for the motor frame mounts is 0414 59.00 and u also need
the tall motor mount not the clam shell type nor the short style.
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  #15  
Old Mar 29th, 07, 12:01 PM
68_RATPOISN 68_RATPOISN is offline
 
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Default Re: Another header clearance question

Welcome to my world and others it seams....I am in the process of a 6cyl to BB swap and I am having the same issues. I have BB stands and tall Solid Moroso mounts and still have header (Hooker Pro Comps) to PS box issues.Some times I just stare at it and says why did I not just put in a SB....Then I look at it and just imagine it running and say that is why I am dealing with these headaches
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