I have the Keoghs adjustable shock found here.
https://www.aliexpress.com/item/3281...3-76cdf671bc30
It is listed as 320mm on the options list, but is in fact 325mm. The extra 5mm in length will result in about a 1/2" higher ride height than stock with the suspension at full droop, and the total stroke of the shock gives the rear about 7 inches of total travel, which is just a bit more than the stock shock. The spring rate for these shocks is 1200lb/in, which is perfect if you are a bigger guy (200+lbs). I have yet to bottom out my rear shock and I get full travel from it.
If you are a lighter guy (sub 200) then the 1000lb spring rate will likely be more ideal for you.
Just be aware that any small change in length will translate to roughly a 2.54 times change in height - Courtesy of OneLeggedRiders figures and results from a 30mm(1.18inch) shorter shock - 290mm - lowering his bike 3 inches. This figure also exactly matches my change in ride height with a 5mm longer shock, which if you do 5 x 2.54 you get 12.7, which is exactly 1/2 inch.
Interestingly enough, this also means you can easily calculate a ride height change from the difference in length in mm to ride height in inches thanks to the conversion for a mm to an inch being 25.4, and the ratio of length to right height being 2.54. Literally slide the decimal of the length difference to the left 1 point and change mm to inch.
Example: a 30mm shorter shock = 3.0 inch decrease in height. Or a 5mm longer shock = 0.5inch increase in height
If you are curious about how that works we can run through the math. Take 30mm times 2.54 to calculate the change in height, which is 76.2mm. Divide 76.2 by 25.4 to convert to inches and you get 3.
Obviously this isn't an exact thing since the arc of travel of the swing arm will alter the ratio some, but for the range of motion we are dealing with, it is more than sufficient.