azza2u

Hi all,

The more I look, the more I'm finding of bubba's handywork on my car. The car is an early 68 vert with a NOM '68 327 with '77 heads under the hood. I started checking over Easter into why the alternator was moving a lot with the vibration of the engine. Turns out part of the alternator mounting had broken. Problem is it was a mount installed by Bubba and not GM.

At some stage the 68 exhaust manifold has been replaced with a similarly aged manifold, but was missing the 68's mounting boss for the alternator bracket. No problem, as someone quickly welded up a T bracket to mount between the stock bracket and a single manifold mounting bolt (circled in the pic below)



I've done some searching on these forums and found some options. I can't mount it on passenger side because of a/c and can't mount it low because of the p/s. However as my heads have the accessory holes in them I believe I could use either a mid 70's alternator mount (my preference for a stock look http://www.ecklers.com/corvette-alte...l?dept_id=1196), or an aftermarket mount from the likes of Summit (http://www.summitracing.com/parts/SU...1/?image=large). My questions for you guys are these:

1. will these just bolt on and leave the alternator in a similar position to align the belt the same as it is now or will I need to work some form of spacer to align things
2. would using the 70's lower mount attached to the heads mean I could reuse the top adjusting bracket or would there be issues with it raising things and affecting clearance of the radiator pipe?

As shipping parts to Australia is a pain, I'd rather figure these things out here before I put in any orders.

Cheers,
Azza

corvetteload

I have the mounts that bolt to the head and the hockey stick adjuster piece, check my ads NOS
http://forums.corvetteforum.com/c3-p...ieces-nos.html

Easy Mike

A. You need a 68 LH stock exhaust manifold which will have the necessary bolt hole for the alternator mount correct for 68.

B. The 69 and up alternator bracket should mount to your 77 heads.

Kevin_73

I bought a later model bracket (mounts to the front of the head) for Liz's 68. It bolted up to the Brodix head just fine, but since it has tall valve covers installed there was almost no room for the alternator to swing for tightening. I ended up just using another (the one that was on it was bent) header mount adapter.

azza2u

I've seen that there are iron (1st design) and aluminum (2nd design) mid 70's brackets listed on the various vendor sites. Are these pretty much interchangable?

corvetteload

Yes, but the aluminum from GM is more pricier than the cast one

carriljc

Look for this casting numer: 3951337

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If you have holes in the front of your head. I got one for 5 bucks at the junkyard. If you have a junkyard, look for an early 70's GM pickup with a short waterpump.

You can find them on ebay too. Probably one of the best 5 bucks I ever spent....I used to have one of those terrible header brackets that just didn't work very well.

aussiejohn

Azza,

I recently purchased the above part from Summit. It arrived less than one week later and looks the duck's guts. Air freight was pricey, but it was here next week. This should fit your car, and it looks good too.

Regards from Down Under

aussiejohn

azza2u

Unfortunately as I have power steering I have found that the nice chrome mount from Summit won't clear the top of it. Looks like it will have to be the mid 70's GM mount after all.