1966 impala 427

Asked by thehotwheelcollector... Oct 26, 2011 at 07:25 PM about the 1966 Chevrolet Impala

Question type: General

1966 impala that i ordered new 427 cu in  390 hp has 34,000 miles on it never been worked on engine has no stamped numbers on it  has this happened before how does it happen

7 Answers

Nice Car. I had a '66 Impala SS with the 327 4spd. Wish I still had... To answer your question... I've never heard of missing engine code stampings on any Chevy engine. All engines are coded with a prefix and a suffix that identify the motor. The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. All Big Blocks are stamped there Read more: Chevy Big Block Identification | eHow.com http://www.ehow.com/way_5147043_chevy-big-block-identification.html#ixzz1bzsi3dfr

checked every bit of block has casting numbers no stamped numbers ordered car new oct 65 took delivery march 66 someone told me they heard of others with no numbers dont know how it happened

Certainly is odd. Maybe yours is the rarest of the breed. Good Luck


If you are brave, go to your local PD and ask to talk to the auto theft detail. If they are receptive to the donuts you brought them, they will not only tell you where to look for the number, they may even help locate it. MAKE SURE you did not do an engine swap. If you did it may be stolen property. In that case, eat the donuts yourself.

I have a 66 impala also with a 427 bought new in early 66 and there is no vin on the pad its bare with the broch marks still in place. never had it when I bought it new.


There are other places the vin is located. Start with the registration. Check the door and door frame on the drives's side. There is two or three places underneath that they are placed on. If you have trouble finding it, you local Police Department vehicle theft investigators can help tell you where to look. Sounds like a factory oops,(?) unless in 1966 you bought a stolen one. The detectives can tell if the rivets are factory or after-market ones. If you got it directly from the dealer, and it was new, than if you have all the paperwork, you should not have any problems. The DMV or police detectives should help you correct it. If you get pulled over and a policeman try to check the vin on your registration card withe the one on the dash, you may have it towed until it can be verified you are the rightful owner. That my friend is up to you to correct.

Original rosette rivets are very easy to obtain so even if the police see the vin they'd never know if it had been changed if someone did it correctly .. only a true impala enthusiast would know all the details to look for. Most of the time in my experience if the numbers are not on the block it's usually a service replacement and in some cases instead of having the SR stamping it's simply left blank.. remember these cars were built to be driven, not for collectors to go looking for numbers 50 yrs later. Either way you'll still have engine derivative number that'll tell you what it is and you'll have a date code.. not sure where located on chevys but it usually looks like a screwdriver has been hammered into the block at both ends (usually near distributor hole on bop) and will read ie:D046.. so that would be April (4th letter in alphabet so 4th month. April 04, 1966. Just a FYI

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