Alternator Bracket
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,363
Likes: 0
From: Canton Ohio
Alternator Bracket
I just bought headers to replace the cast iron manifolds for my SB 74 Vette. I noticed that the bottom of the alternator is bolted to the manifold. Which bracket do I need to keep the bottom of the alternator secure once the headers are installed?
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
I don't remember my 77's alternator ever having a bracket that bolted to the back. Just the pivot shackle for the bottom and the big adjusting arm for the top. It probably had something from the factory in back, but I never noticed a problem. My best suggestion - install the headers, bolt the alternator in place tightly with the pivot and the tensioning arm, fire the engine up and see if the alternator stays put when you rev it a bit. If it stays put, I'd say you're probably OK.
The A/C compressor is supposed to have a similar brace. Mine never had one of those, either, and I never noticed anything bad.
The A/C compressor is supposed to have a similar brace. Mine never had one of those, either, and I never noticed anything bad.
Drifting
Joined: Jan 2006
Posts: 1,944
Likes: 22
From: Yooperville MI
It sounds like you have a '71 and earlier style lower bracket on your engine. '66-'71 lower brackets were stamped steel and had an additional rear brace that attached to the exhaust manifold. The '72-'82 lower bracket is cast iron and does not attach to the exhaust manifold and needs no modification for headers.
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
then the f bracker for the alt.
both available at jegs
http://www.jegs.com/webapp/wcs/store...10002_13528_-1
http://www.jegs.com/webapp/wcs/store...10002_13530_-1
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,363
Likes: 0
From: Canton Ohio
I guess I will have to wait and see when I get the old manifolds off to see it what I have to work with.
But you are saying that the alternator is not attached directly to the manifold and that their is just a bracket sandwiched in between the two?
But you are saying that the alternator is not attached directly to the manifold and that their is just a bracket sandwiched in between the two?
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
It sounds like you have a '71 and earlier style lower bracket on your engine. '66-'71 lower brackets were stamped steel and had an additional rear brace that attached to the exhaust manifold. The '72-'82 lower bracket is cast iron and does not attach to the exhaust manifold and needs no modification for headers.
