73 chassic stencil

[Gerald A.]

I am still looking for the correct stencil numbers for my frame. I have posted this message in the past, but still do not have the answer. After 1972 no one seems to be able to tell me how the numbers are derived.
If anyone has a 73 with the numbers on the frame, please let me know what they are. Thanks for the assistance.

gerald

[Tom R.]

Re: 73 chassic stencil

Your post has been hanging out here for awhile...have you tried Quanta?

[Gerald A.]

Re: 73 chassic stencil

Tom,

Thanks for the reply, yes I discussed it with Quanta, they can make the stencil, but need the part number for the stincil.

Gerald

[Alan S.]

Re: 73 chassic stencil

Gerald,
Have you spoken with Marvin Burnett, the 73-77 Team Leader?
1Z67T5S@centurytel.net
Regards,
Alan

[Chuck S.]

Re: 73 chassic stencil

I am still looking for the correct stencil numbers for my frame. I have posted this message in the past, but still do not have the answer. After 1972 no one seems to be able to tell me how the numbers are derived.
If anyone has a 73 with the numbers on the frame, please let me know what they are. Thanks for the assistance.

gerald

Gerald, it doesn't appear there is anyone posting on the NCRS TDB that has seen and recorded their 73 frame stencil numbers...Not when you originally posted this question in November 21, 2007, or now.

I can probably help you "make up" a frame stencil from your frame part number and 72 information...it will appear correct, if not be nearly literally correct. To do this, we will use the 72 stencil format, the 73 frame number, and logical extension of a series of frame "suffix" numbers that began in 71.

The first step will be for you to look in your 73 AIM for the 73 frame part number. Joe Lucia previously supplied two part numbers to you, but those appear to be six digit A. O Smith part numbers...what we need are the GM part numbers. There will be a single page in the AIM with the frame assembly shown...look in the table of contents; it should be UPC 2, Sheet A1. The other information I'll need from you are the transmission type, and the car's build date.

As soon as you reply, we can get started.

[Harmon C.]

Re: 73 chassic stencil

I have posted this information and have pictures of original 73 frames with both auto and standard. I do not have the information at hand. Dr rebuild shows the numbers in his on line catalog was said on CF.

[Chuck S.]

Re: 73 chassic stencil

I have posted this information and have pictures of original 73 frames with both auto and standard. I do not have the information at hand. Dr rebuild shows the numbers in his on line catalog was said on CF.

Lyle, I researched the archives myself and can't find any previous posts by you with this information. If you are able to lay your hands on those photos, I'm sure it would be a big help to this guy.

This was your post in the November 21 thread:

Lyle 24961

Re: Chassic Stencil
I have posted the number and Joe has the first part and then their is a dash and a number on the frame. Try the AIM it may have it. I will check my records.
Lyle


Incidentally, the suffix numbers will NOT be in the AIM, or any other GM literature to my knowledge. Unless the suffixes have been observed during restorations...they simply won't be available. There's no way the publishers of the AIM could have known in advance which, or how many, suffixes would be used, but if I had to GUESS, I would say that two to four were used just like in 71, 72. In the series beginning in 71, the 73 suffixes should be 150/151 (manual tranmissions) and 160/161 (automatic transmissions)

In any event, if the original stencil is worn off the frame, we're playing an inexact guessing game anyway. But...the good news is that beyond checking for the correct part number and a crude assessment of the date, no one else will know the difference either.

[Harmon C.]

Re: 73 chassic stencil

You should only see about half of about six numbers from under the car. They are covered up by the metal lower rear fender splash shield and are under the rubber trim on all 73's I have had with some of the numbers still readable. From under the hood it's hard to see any of the stencil.

[Gerald A.]

Re: 73 chassic stencil

Thanks to everyone who replied. One memebr suggested Dr. Rebuild, once I give him my build date he has the stencil part number.
Again, thanks to all who responded

Gerald

[Tom R.]

Re: 73 Frame GM Numbers

Ok...here they are out of the 73 AIM but than the description does state "frame assembly" which suggests other stuff was assembled to the frame. It may only mean that the frame assembly includes body/engine mounts (welded) and other mounting assemblies.

M20/M21 = 330960

M40 = 330970

[John H.]

Re: 73 Frame GM Numbers

Ok...here they are out of the 73 AIM but than the description does state "frame assembly" which suggests other stuff was assembled to the frame. It may only mean that the frame assembly includes body/engine mounts (welded) and other mounting assemblies.

Tom - Any GM part that's composed of two or more detail parts is normally called an "assembly"; the frame has about 60 parts welded together to form the "frame assembly". Photo of the C2 "frame assembly" drawing below.

[Chuck S.]

Re: 73 Frame GM Numbers

Ok...here they are out of the 73 AIM but than the description does state "frame assembly" which suggests other stuff was assembled to the frame. It may only mean that the frame assembly includes body/engine mounts (welded) and other mounting assemblies.

M20/M21 = 330960

M40 = 330970

Thanks, Tom. I am not surprised that Joe Lucia's response in the earlier thread was correct. Those six digit part numbers were out of sequence for earlier GM frame part numbers, but close for A. O. Smith part numbers, so that's why I wanted Gerald to confirm.

Apparently, these "six-digit" frame part numbers were some of those "recovered" unissued GM part numbers that Joe has talked about.

If I were GUESSING in order to have a stencil to apply, I would GUESS the following for an early 73 car...for a late car, it will be a WAG or a simulation without more info:

Manual: (1st line)330960 - 150; (2nd line)M.D.YY

Automatic: (1st line)330970 - 160; (2nd line)M.D.YY

where M=month, D=day (each may be either one or two digits, but no preceding zero), and YY=year.

In Gerald's position, I would just order one from Doc Rebuild with my build date. I have a high level of confidence in the Doc right down to getting the suffix right...particularly if they came up with something close to the "educated guesses" above; BWDIK, this is for a 73, and I'm off my turf.

P.S.: I assumed the sheet reference was "frame assembly" because the bolted differential cross member was a separate part number that had to be assembled to the frame itself.