Hi guys,

I found the tag on the block and would like to know the validity of the 91 corvette engine that I have. It appears as follows: V1213ZTC. There are also some smaller letters and numbers under it but I didnt have time to write them down.

Can someone send me to a block decoder or something? Can anyone decode it for me? I would just like to confirm that it is a 1991 corvette 5.7L TPI engine.

By the way I will be getting the head numbers too. Is there a decoder for that as well?

 

1991 ZTC 350 a/t, alhds, oil cool L98 8 245 TPI Vette - www.mortec.com

 

V1213ZTC

V = Flint engine plant
1213 = December 13

ZTC = 1991 350
Automatic transmission
Aluminum heads
Oil cooler
L98 Vin code 8
245 HP TPI
Corvette

Yes it is an original 1991 Corvette 350 block. The other numbers under that set should be 6 digits. It will match the last 6 of the VIN number (numbers matching)

Just about any number stamped or cast into the block or heads can be decoded.

 

thanks guys!!! I am so happy to finally know for a fact that it is a 91 corvette block. Now I gotta pull the heads and see what she has

 

if they look like their aluminum I'd say they are most likely factory alum l98's.