One of the things causing the "Ticking" on the 1GR-FE is the PWM Valve (also know as VSV), located on the drive side of the intake.
It is held onto the intake assembly with 1 10mm bolt. The Ticking is amplified by the plastic assembly, but it can be quieted down by installing some rubber washers inbetween the Valve, and the mount on the intake. I used (4) 1/16" thick rubber washers purchased at Ace Hardware.
Useing 2 inbetween the bolt head, and the valve, and 2 between the valve and the intake.
Very easy to do. First, remove the 10mm bolt:
Then install the washers, and re attach the Valve.