well i need a little insight as to which head gasket i should get. i took my motor to the machine shop a while back and have recently started to assemble the motor. I was taking a look at the block and realized that i cannot see the engine block numbers on the deck surface on the passenger side. the engine shop cannot remember what they took off and it's not written down on my build sheet. i was wondering if anyone knew how deep the casting numbers are and if anyone had any insight as to what head gasket i should use as to thickness. they also decked my heads. and the motor is bored 20 over.