Oil Catch can and 68mm TB

Installed my oil catch can and revised 68mm throttle body this weekend.

I am curious if there is anyone else out there who a) has an ITR, and b) uses the Holley 68mm TB.

I am having a problem with idle dwell, i.e. won't come back to idle when I release the gas, and I am not quite sure about what would induce this characteristic.

Any input would be appreciated.

Cheers.