Been rocking the Mazda M5OD-R2 in my 1996 Bronco for 25 years... and no complaints. I owned a 1993 Ford Explorer with a M5OD-R1 and drove that thing across the country a few times.
https://en.wikipedia.org/wiki/Mazda_M5OD_transmission
probably the best Small block manual you can pick up would be a ZF transmission from Germany.... and it is a direct swap replacement of the M5OD-R2... hell you can even use the same drive shafts.
https://en.wikipedia.org/wiki/List_of_ZF_transmissions
Not sure why would even go down the road of reliability and manual transmissions??? That is biggest selling point on getting a stick. Heat kills.... and a slush box automatic produces loads more heat than any manual.
You really want something to worry about.... try researching the Ford DCT transmission produced by the Ford motor company... before you go down the rabbit hole of a imported manual... you just might want an imported manual after reading.
transmission.https://en.wikipedia.org/wiki/Ford_PowerShift_transmission
Ford has faced class-action lawsuits and fraud investigations in the United States,
[7] Australia
[8] and Canada
[9] over the PowerShift gearbox as being defective and potentially dangerous in the
Ford Focus,
Ford Fiesta and
Ford EcoSport. The lawsuits allege that vehicles equipped with the PowerShift gearbox "continue to experience the transmission defect, including, but not limited to, bucking, kicking, jerking, harsh engagement, and delayed acceleration and lurching." U.S. courts tentatively approved a settlement of the U.S. lawsuit on April 25, 2017.
[10]
Ford has claimed that the defects were caused by either a faulty throwout bearing or input shaft and
rear main seals that leak fluid onto the clutch causing it to slip. Ford has released fixes of the seals and updated clutch kits, but transmissions that have been repaired are still having repeated issues.[
citation needed] There were also issues with the
transmission control module such as faulty connector pins, shifter motors failing, and a poorly connected main ground wire due to paint on threads or an incorrect bolt being used during assembly. These transmissions were still installed into Focus and Fiesta until Ford ceased production of them.
However, subsequent journalistic investigations conducted after the Focus and Fiesta models were discontinued has revealed that Ford engineers and executives were aware of the problems before and after the release of it, with developmental engineers even stating in company e-mails that there was "no driveable calibration" of the transmission, and with pre-production test engineers having to pull over out of traffic due to the transmission shifting into neutral. However, Ford has repeatedly denied systematic problems even to their own dealerships, instead directing them to replace the transmission over and over even though it was never truly fixed