All I want is a nice street machine that can get into the low 13's and make it a weekend driver. While I'm in college, I'll come home on the weekends to work on it and my ole man will be working on it during the week. He has the templates to port and polish the heads. I want right around 10:1 compression in the motor and I'll probably just have the factory 3.23 sure grip posi rebuilt just for safety sake. Do the 346 really come with hardened seats from the factory??? I thought they needed hardened seats put in.