Need Your Help Identifying This Early '67 AC Part?

[Mike B.]

Good Afternoon Guys,

I recently bought 3 big block AC compressor brackets online reportedly from an early '67 427 AC Corvette. Supposedly from an October '66 build car. Two of the brackets are correct for Corvettes but one is an oddball to me. But seeing as though I'm not very well versed in early '67 BB knowledge I was hoping to get some opinions about this mystery bracket. Sure could use your help here.

First, I'll post a few shots of a known correct '66-'67 Corvette big block AC compressor intake manifold bracket. This is not the bracket in question. I'm posting these shots for a comparison. Then I'll post the oddball bracket shots. Thanks, Mike

[Mike B.]

Re: Need Your Help Identifying This Early '67 AC Part?

Here's the oddball bracket taken from an early build (October '66) 1967 427 AC Corvette. I know this is a stretch, but maybe some of you recognize this bracket? Any other early '67 427 AC Corvette's with this bracket out there?

The '67 AIM was redrawn and released January, '67 with new bracket numbers different from the '66 brackets.

Later I'll post a thread of the evolution of '66 thru '67 BB AC compressor brackets with photos.

Here's the mystery bracket. Thanks everyone. Mike

[Domenic T.]

Re: Need Your Help Identifying This Early '67 AC Part?

Mike,
Looks like the one that is bolted with the intake bolts to the intake manifold. It holds the adjustment rod for belt tension, if I'm right!

Dom

[Vernon S.]

Re: Need Your Help Identifying This Early '67 AC Part?

Hi Mike ,
Dominic is right on. It appears to be the same bracket that is held by two intake manifold for the compressor on my 1966 BB.

Skip

[Mike B.]

Re: Need Your Help Identifying This Early '67 AC Part?

Hi Dom and Skip,

Thanks for responding. Let's take a careful look at my 1st and 2nd posts to this thread. Post #1 shows three shots of a correct '66-'67 427 Corvette intake manifold compressor bracket #3872726. I posted these 3 photos for a comparison to the oddball bracket that I show in post #2.

Post #2 of this thread is the mystery bracket in question. It is also a "U-shaped" intake manifold compressor bracket but it's much wider than the #3872726 bracket. It also has two scalloped cuts that appear to be foundry manufactured. I've never seen this part anywhere on any Chevrolet car.

This part was said to come from a very early '67 427 AC car. I'm trying to determine if it was original to the car from the factory. Normally I wouldn't have thought twice about this bracket being an original Corvette part had it not been for the other two brackets that accompanied it. They are both very rare Corvette brackets. These two brackets are part#s 3887165 and 3887166. These 2 part #s are listed in the '66 AIM for 427 AC compressor brackets. I'm assuming that these brackets were leftovers from the '66 Corvette production run and the factory was still installing them on early production '67s?

Dom and Skip. Are you saying that your brackets look identical to the bracket in post #1 or post #2?

It's always a pleasure to speak to you both,
Mike

[Vernon S.]

Re: Need Your Help Identifying This Early '67 AC Part?

Hi Mike, My bracket looks like your first post.

Skip

[Mike B.]

Re: Need Your Help Identifying This Early '67 AC Part?

Thanks Skip,

That's the one your car should have according to the '66 AIM, C60, sheet C3. Part #3872726. And as original as your '66 is, I wouldn't have expected anything else!

We'll see if there are any very late '66 thru very early '67 427 AC cars with the wider bracket shown in post #2 below. Probably a long shot, but I didn't want to put it into the "unknown" parts pile just yet. If these cars could talk, the stories they'd tell.

Mike

[Peter M.]

Re: Need Your Help Identifying This Early '67 AC Part?

Hi Mike,
I don't know what the second bracket is. Does it have a casting number? Do the bolt holes line up with BB Chev intake bolts?
The first bracket is the same as my mid April 67 427. It appears the same as the bracket on a 66 Caprice BB and a 66 Chevelle SS396 I used to own (I can't confirm the casting number).
Kind regards

[Mike B.]

Re: Need Your Help Identifying This Early '67 AC Part?

Hi Peter,

Just bought the 3 brackets online a week ago. The seller said all 3 came from an October '66 build 1967 427 AC car. The wide oddball bracket shown in my 2nd post here is unknown to me. I was hoping that there may be someone out there that might have seen it on a late '66 or an early '67.

I guess I should post a shot of the brackets together. The other 2 brackets here are rare and are for the '66 427 AC Corvette. I was thinking there's an inside chance that these brackets truly came from an early '67. Leftovers from the previous year's production? Maybe not. But even if they aren't, the #3887165 and 3887166 brackets were a very lucky find. Mike

[Mike B.]

Re: Need Your Help Identifying This Early '67 AC Part?

Peter,

The bracket in my 1st post is the correct one listed in the '66 and '67 AIM, #3872726. I posted a closeup of the part number there. That's the bracket I'll use on my '66 L-36. It's the nicest one that I have in stock.

The mystery bracket from post #2 probably isn't original to the car from the online sale I just purchased. But again, it came along with these 2 rare brackets. Just hoping. Won't pursue it much longer. Thanks Peter.