I'm dealing with a 72 built October 18, 1971. I've been able to trace all the owners, because small towns don't pay much attention to privacy laws. None of the previous owners knew about or cared about numbers. 93k miles, original motor, trans, rear. Starter and radiator have been replaced. Motor is cast August 30, assembled September 9. The carb,,smog pump, fan clutch, alternator, fan blade, brass expansion tank, intake, flywheel, AC compressor, jack, radio, flashers, wiper motor, horn, door panels, seat belts, shoulder belts, wheels, spare tire, etc. are all dated in expected fashion.
The two-page purple carbon build sheet was rolled up under the dash and I have had it NCRS-validated.
There are a few components that I have questions about. I've not played with big blocks, but as many of you know, I've written several dating articles for NCRS on small blocks.
I would appreciate input on the following:
The heads are dated acceptably for a September 9 motor, June 28 and July 6, but they are 3993820 casting numbers, which are correct for 71, not 72. Any thoughts on that?
The exhaust manifolds are the correct casting numbers (which are the same for 71 and 72, but casting dates are April 16, 1971, and December 15, 1970.
The distributor is a correct 1102051, but is dated January 26 of 1971.
None of the previous owners (I have talked to 2 of the 3, and the middle one who is lost only owned it for a year and the other two said he did nothing to it except drive it) are aware of anything being done to the car except replacement of a flat cam which was done by owner number three himself.
Thoughts you have about why the distributor and manifolds are not in the normal timeframe and/or why the heads are 71 casting numbers?
The two-page purple carbon build sheet was rolled up under the dash and I have had it NCRS-validated.
There are a few components that I have questions about. I've not played with big blocks, but as many of you know, I've written several dating articles for NCRS on small blocks.
I would appreciate input on the following:
The heads are dated acceptably for a September 9 motor, June 28 and July 6, but they are 3993820 casting numbers, which are correct for 71, not 72. Any thoughts on that?
The exhaust manifolds are the correct casting numbers (which are the same for 71 and 72, but casting dates are April 16, 1971, and December 15, 1970.
The distributor is a correct 1102051, but is dated January 26 of 1971.
None of the previous owners (I have talked to 2 of the 3, and the middle one who is lost only owned it for a year and the other two said he did nothing to it except drive it) are aware of anything being done to the car except replacement of a flat cam which was done by owner number three himself.
Thoughts you have about why the distributor and manifolds are not in the normal timeframe and/or why the heads are 71 casting numbers?
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