1966 427/425 Engine Pad Broach Marks

[John M.]

Can anyone tell me what to look for on a 1966 Big Block Pad to help determine if the engine stamp broach marks are original or a restamp!!

[Chris H.]

Re: 1966 427/425 Engine Pad Broach Marks

John, in this case a picture is worth a thousand words. If you can post a close up, hi resolution photo of the pad, we can give our opinion.

We're basically looking for particular broach mark and font characteristics.

Chris

[Joel F.]

Re: 1966 427/425 Engine Pad Broach Marks

John,

I suggest you search for threads on this topic in the archive. Unfortunately, the topic is not so simple as to be definitively answered in a few paragraphs. You would want to study both known original broach marks as well as good and bad quality fake broach marks to get a good feel for the subtle differences between them. An archive search should yield many pictures that can help in this task.

Alternately, if you have a good high res photo of the engine in question, posting it here will yield some highly qualified opinions on them.

Joel.

[John M.]

Re: 1966 427/425 Engine Pad Broach Marks

Thanks guys, I will do my best to get a good photo and post as soon as possible.

[Steven C.]

Re: 1966 427/425 Engine Pad Broach Marks

Can anyone tell me what to look for on a 1966 Big Block Pad to help determine if the engine stamp broach marks are original or a restamp!!

John, is your inquiry regarding the surface of the pad, the characters on the pad or both?

[Tim S.]

Re: 1966 427/425 Engine Pad Broach Marks

This is a restamp


this is an original


note the crispness of the restamp on both the broach marks and the characters. That is what many are looking for.

Tim

[Ronald L.]

Re: 1966 427/425 Engine Pad Broach Marks

That and the numbers are crooked.

[Joel F.]

Re: 1966 427/425 Engine Pad Broach Marks

That and the numbers are crooked.

Just be careful, crooked numbers are not always the tell tale sign you might think!

[Kenneth B.]

Re: 1966 427/425 Engine Pad Broach Marks

That and the numbers are crooked.

I believe that most if not all IP blocks the P is tilted to the right.
KEN

[William P.]

Re: 1966 427/425 Engine Pad Broach Marks

Hi John, If the stamp pad you are looking at is a car you are concidering to buy I would advise that you make the deal conditonal on having Al Grenning certify it as origonal to the car. He will only do it for the currant owner . If the car is the real deal it won't be cheap and the money you or the seller pays Al will be peace of mind for you.
If you post pictures on this or any other Corvette site of the pad you will get a lot of opinions for free and that is what they are worth . $ 00.00

Regards Bill Purdy

[Dick W.]

Re: 1966 427/425 Engine Pad Broach Marks

Here is another

[Kenneth B.]

Re: 1966 427/425 Engine Pad Broach Marks

Hi John, If the stamp pad you are looking at is a car you are concidering to buy I would advise that you make the deal conditonal on having Al Grenning certify it as origonal to the car. He will only do it for the currant owner . If the car is the real deal it won't be cheap and the money you or the seller pays Al will be peace of mind for you.
If you post pictures on this or any other Corvette site of the pad you will get a lot of opinions for free and that is what they are worth . $ 00.00

Regards Bill Purdy

I beg to differ. I think Al will only say that it is factory correct. NO ONE can certify that it is a factory stamped pad. The good restampers are so good that no one can tell. Trust me some have almost as many pictures of pads as he dose. If it passes NCRS & BG what is the big deal. If you are not the original owner you have no clue if it is the original block & 75% of the HP motors 25 years ago were not. Why are there a lot of 396,425. & 435 cars certified NCRS& BG today. Al will tell you all sorts of things happened when blocks were stamped. Don't drink the coolaid. I think good paperwork is your best bet if you want to know what engine was original to the Corvette. Al can tell any repo POP or tank sticker. I have sent him alot & others have over the years including Terry @ Proteam. He has GM paperwork that only he has on ELC #'S KEN

[David D.]

Re: 1966 427/425 Engine Pad Broach Marks

Here is another

Another what? Original or restamp? I am not an expert on engine pads. Dave

[Ronald L.]

Re: 1966 427/425 Engine Pad Broach Marks

Since we are talking 66 427 stamp pads, has anyone seen the "1" in the date stamped as a "I"?

[John M.]

Re: 1966 427/425 Engine Pad Broach Marks

Hi Ronald,

My stamping also has an "I" for a "1".