Messages

1

Decoding/Numbers / Re: Big Block Fan Shroud

« on: September 20, 2012, 01:40:14 PM »

Thanks for your reply PlumL78.  Do you know the reasoning behind the cutout and hole?  The cutout for easy belt removal makes some sense, but I see no advantages or need for the hole. 
The reporduction is too thin and flimsy.  It looks like it is warped from the heat and looks way too shiney.  I guess I can always scuff it with a scotch brite pad to dull the shine, but there is very little to do about the flimsyness of the part and the warpage.

2

Decoding/Numbers / Re: Big Block Fan Shroud

« on: September 20, 2012, 03:24:13 AM »

Yeah, this is the 2005 thread I was talking about in my original post, but it doesn't really mention the hole and cutout.

3

Decoding/Numbers / Big Block Fan Shroud

« on: September 20, 2012, 03:14:29 AM »

Hello Everyone!
I am glad to have found this website and forum.  I hope someone here will be able to help me find some answers before I lose my mind   and a lot of money.  Here goes.......

I have a 1968 Camaro with a 396 cid and I am in need of a Fan Shroud.  The reproduction fan shroud is simply junk, and I am lucky to have found a NOS fan shroud!  However, I am very reluctant to pay $1,600 for the fan shroud because it does not look right.  It has part number 3945789 heat-stamped over the original 3916637 part number, and it has a cut-out and hole in it that does not look right.  I have spent countless hours on the internet and phone trying to get information about the 67-68 BB Fan Shrouds but have gotten mixed information. One guy told me that the 3945789 was modified from the factory when GM superseded the part number for easy belt removal, and that it also fit the 68 BB Nova. This guy actually emailed me a Blueprint (see attached) he says he got from a contact he had at GM.  It clearly shows the cut-out and hole, but I have never seen this before.  I found an old CRG Thread from 2005 about his very topic, but it does not mention any cut-out or holes.

Here are my main concerns and questions:
1) Was the 3916637 BB Fan Shroud used on the assembly line for both '67 and '68 model years?
2) Was the superseded p/n: 3945789 done in November 1968 (as the 2005 CRG Thread states) just a part number change?
3) Were there any modifications or changes done to the Shroud from the factory when GM/Chevy superseded the part number (as depicted in the Blueprint)?