70SS Block Stamp - Chevelle Tech
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post #1 of 4 (permalink) Old Jan 9th, 19, 1:33 PM Thread Starter
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Randy
 
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70SS Block Stamp

I'm checking out an original 70SS, 396, 4 speed car for a friend. The block stamp looks good to me as I can still see the broach marks on the block deck. The owner sanded the rust off the pad. The partial VIN is stamped down by the oil filter and is faint but its able to see. Its a early April Flint built car. Block cast date is C-5-70. Heads are dated early March along with the intake. Any thoughts on the deck stamp?
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post #2 of 4 (permalink) Old Jan 13th, 19, 2:40 PM
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Dale
 
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Re: 70SS Block Stamp

Flint is known to stamp their partial VIN by the oil filter in 1970, so that fits. Dates are all within reason. Fonts on Tonawanda stamp look good. I know a lot of people put heavy stock in seeing broach marks. Might take a look at the data here about them.

Engine Assembly Order

TC Gold #92 ~ August 1998
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post #3 of 4 (permalink) Old Jan 13th, 19, 3:10 PM Thread Starter
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Randy
 
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Re: 70SS Block Stamp

Quote:
Originally Posted by DaleM View Post
Flint is known to stamp their partial VIN by the oil filter in 1970, so that fits. Dates are all within reason. Fonts on Tonawanda stamp look good. I know a lot of people put heavy stock in seeing broach marks. Might take a look at the data here about them.

Engine Assembly Order


Thanks Dale for that web page. I know many people put a lot of trust in broach marks but I know that they can fake those too now. Pretty sure this is the first time that engine had the heads off it. Car only has 46K miles. This car has everything it came with except the master cylinder and the TCS switch. Tranny and rear end all original. Carb, starter, solenoid, alternator, distributor, water pump, fuel pump, are all originals. Now to find a master cylinder. Thanks again.
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post #4 of 4 (permalink) Old Jan 13th, 19, 3:40 PM
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jerry
 
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Re: 70SS Block Stamp

IMO, while they can be faked, they never match exact. There is a fair amount of pitting on the deck which indicates the block was not decked. The original stamping might be .015-.020 deep so if it was decked to remove the stamp, that machining would likely remove the pitting also.
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