original engine?

i am looking for any info on how to tell what size engine came out i my 69 coupe. when purchased , i was told it had been a big block car. it had a non original small block. that is fine but i would like to make the car as right as it could be. i was wondering about the tach maybe as a clue.

Welcome the the Shark Tank, olskool!!


Check out THIS THREAD on the same topic. Chevy did not put engine sizes in the VIN until '72... Adams' Apple2006-09-22 18:43:41

Mine was easy when I bought it. Anything that slimy an greasy had to be original. About what seemed to be a gallon of engine degreaser later I was able to read the numbers and verify the match with my buddies at the local speed shop.

thanks for the help so far guys. i will keep on looking for clues. this car was in rough shape when i got it two years ago ( bare frame in front of the firewall, no fenders, radiator support, nothing.) it has been a labor of love, mostly!  it is my second vett and i have turned nearly every bolt on the car. i want to put it back as original as possible and still have a good driver for our vette weekends. we took it to funfest in illinois this last weekend about 400 miles round  trip and i listened to every little noise that she made. checked it over when we stopped like a worried father. it was great!