Just noticed you referenced the wrong Manley rod in the screenshot of the catalog. I went and looked in the catalog and the pictured rods are standard Manley H beam rods, Manley also offers an "H tuff" series which looks to be just a beefier H beam rod, then the "H Tuff Plus" are the same...
Nicely done. I too am going this route after seeing this done on the “throtl” YouTube channel when they built a RWD Honda EK:I’ve attached pics of the unit I bought, (came from a 02-07 Saturn Vue/ 05-06 GM Equinox) the adjustment knob is also available on eBay...
FYI, we have another option. Eagle rods came out with an "Extreme Duty" variant of their rodshttps://eaglerod.com/XD6 bolt 22 pin: https://www.eaglerod.com/item/5524253-mitsubishi-4g63-89-93-extreme-duty-rod-4?category=196777
6bolt 21 pin...