As long as the pushrod fits and allows for the clearance to be adjusted, there will be no real problem using it.
To adjust, I put the damper at tdc and start at either #1 or #6, whichever is on compression and follow the firing order from there. To get started, You can probably tell which is at tdc on compression by looking at the height of the pushrods relative to the head. The ones that are lowest should be the one you need to adjust.
Lawrenceville, GA