Alright here we go: https://i.imgur.com/9zBgwMe.jpg (embed)

This setup consists of:
>SCS10 LM10UU Block bearings
https://www.amazon.com/gp/product/B0742CT25Z
This is a linear bearing in a block. It bolted into whatever and 2 working together make your push rod fly straight and smooth.
>10mm Polished Steel Rod
https://www.amazon.com/gp/product/B0050RMC7W
This here is your push rod. It's pretty smooth and should be pretty straight. It slides and makes sweet McLovin to those bearings to do the in and out thing.
>SI10T/K Rod End
https://www.amazon.com/gp/product/B074285G6J
This is a pretty nifty part, It's a full motion bearing. This will give it the ability to move with both radial *and* some axial motion. It will really help (along with a true U-joint) to counteract the imperfections in your flywheel.
>M10 x 250mm Threaded Rod
https://www.amazon.com/gp/product/B078H54HLX
This is your connecting rod, It threads into the "rod end". (That name makes so much sense now, huh?) If you wanted it to look nicer, you could get a rod with just threaded ends.
>10mmx10mm Universal Joint Coupling
https://www.ebay.com/itm/172783530316
Jesus, was this part hard to find already imported. It is a very important part and serves a fuction that MachineYourself covers to a fair degree. If the set screws aren't strong enough, you may need to file a notch for them to lock on.
https://www.machineyourself.com/driveline-components#comp-ilycttxr