1969 matching numbers

[John B.]

Can anyone give me a quick schooling on numbers on the pad of a 1969 350-350hp? What should I look for to make sure it hasn't been restamped? I know on midyears there are broachmarks from the original stamping.....what about 1969? If anyone has a picture of their engine VIN and Trim tag from that year I'd love to see it. Thanks!

[Tom S.]

Re: 1969 matching numbers

The stamp pad is not your only concern.The casting # on the block should be #1 and the correct heads are very important on the 350/350 also. Trim tag is also important, but I would make sure the engine is correct, not just a # matching pad.The block # should be 3932386,3932388,3956618,3970010. That will vary with build date.Build dates will start with A for January and so on.Your heads should be 3921786 or 3921787. These heads are very expensive if you have to buy them and somewhat hard to find.Hope this helps. Tom

[Chuck S.]

Re: 1969 matching numbers

Broach marks...C2 or C3, broach marks are NOT from the pad stamping process.

Broach marks exist because the top "pad" surface is an extension of the block surface, or "deck", where the right head is bolted. Both deck surfaces and the oil pan rails were simultaneously machined by a huge multi-bladed machine that cut the cast iron block like a cheese knife. Broach marks are the tiny tracks left by nicks and imperfections in the blade cutting edges.

A good starting point for buying a 69 is to buy the 68-69 TIM&JG; it should have an explanation of the pad stamp format, as well as myriad other very important information about 69s.

[Steven C.]

Re: 1969 matching numbers

John, the "schooling" takes years and involves examining hundreds of cars. There are no shortcuts when it comes to experience. Take someone knowledgable with you.

[Clarence K.]

[Tom S.]

Re: 1969 matching numbers

John
Everything Gene said is about correct.And if you are not sure do as Steve said and take a knowledgeable person with you..Try to find an NCRS member in the area to look at it,if he has been through the judging process or is a judge he could be of great help.. Tom