There are few factory 80 down here HZJ80 with A442 and indeed it's slow .. but surprisingly ( at least to me ) they are not really worst than a manual 1HZ 80 ..
2H that's a slow Turtle ( never 80 factory Drivetrain although )
I had to remove that valve when it went down few years ago .. and the consequence, it's you will fill it up the hole system all times.
It wasn't a problem to me but it might be for any other person that does not like to use the rear AC all the time ..
You will get more power out of the FT more easily if that's your goal .. to get standard numbers both get them easily while the FT it's a much more expensive engine .. and hard to come by.