Long sitting 273, any ideas?

Real quick and easy to check. Drivers side of the block above the 3rd freezeplug back. will be a long number(7 diget i believe) followed by cubic inch and then another #. Example 2780930-340-2 Looks to me like someone put a 318 in your car. Block show any signs of red? If you end up needing a 65 273 or a 340 PM me.

It's even easier than that. FRONT of block, drivers side, immediately below the head is a stamped no. I never remember if it's 234, or 345 #'s are the CID, 273/ 318 etc. You are gonna croak if you find out it's a 360