DONT mount the sender on the T for the one millionth time.. (maybe not to you but).. if you mount the sender incorrectly it could snap and spray oil everywhere..
http://autometer.com/download_instruction/0621B.pdf
it is correct to put in the T.. run approved braided line to the sender which is mounted (normally) on the fire wall..
edit:
unit is to be installed on a high vibration application such as a full race
engine or engine capable of high RPM, it is strongly recommended that
the sender be remote mounted to either the fenderwell or firewall, to
insulate from vibration. Failure to remote-locate pressure senders on
such an application could result in gauge failure and potential
damage to vehicle and/or operator injury. Braided stainless steel lines
are sold separately by Auto Meter, and can be used to accomplish this.