Yes, follow his direction if he is who you are going to use for a cam. They have been posting a bit here trying to get some customers, I'm interested to see how their new stuff runs.
But not literally install the cam before the air cleaner, you should always check piston to valve clearance.
I recommend getting two head gaskets, so you can torque one to check piston to valve clearance, then use the other to build the engine. Save the one for checking piston to valve clearance for our final compression check/verification.
And lift for a cam is in inches. The duration is in degrees (that is how long the valve is open while the crank turns). Lift and duration are two main specs for a cam, then there are a few others that come into play also.
