Would I need to port the upper and lower or just the lower where it bolts to the heads?Liberty is just a jobber parts house from the Philly area, hence the name.. You can order Pac valvetrain thru them if you wanted and the heads bare or complete plus you can swap springs without pulling the heads pretty easy.. I would ask the builder how he ordered them and what springs it used either way. The as cast port tends to be in the 250cfm range on most benches, its the exhaust that's weak, a box stock edelbrock intake is like 225 cfm tops, a better intake or even porting would help more then a t body or intake pipe. My heads where like 286/188 in my lift range and I'm no porter. I honestly expected to run over the crank in that car but haven't hurt it yet. Rev hang would be in the tune, fords old IAC ain't the best set up.