I received an email from the company that produces these:

The correct phone number for Tru-Line is (208) 889-1369. I am Marlo Vatsvog the developer of the small-cap distributor for the IH fuel injection system. I moved to Post Falls Idaho but failed to update the phone number. Please correct my oversite. This is my 1st visit to your site and as a result the phone has been incorrect for several years.

Thank you,

Marlo Vatsvog
Hopefully this helps folks converting IH engines.