The heads Have two different numbers is that how it is supose to be? I checked my numbers with
http://www.mortec.com
Passanger side is Markings on it GM3T E24\76 #346236
This is what I came up with...
Mortec Site read the following= 75-87...OVAL...OPEN...454,120cc Chamber,225/116cc Ports
Driver side is Markings on it 346\ CFO or CFD #14081045
And
Mortec Site read the following= 78-87...OVAL...OPEN...454
Are these any good I mean the motor runs fine could they cause the motor damage in the long run because they are different in Numbers?