I cannot recommend that set!
I am considering getting the TH8A shifter for my own setup. I like that it has 7 forward and reverse, whereas the G27 only have 6 forward and reverse.
You may consider reversemounting the pedals as I have done with my G27’s.
Here are a couple of links on how to do it with the T3PA pedals
His reddit post about the mod
https://www.reddit.com/r/simracing/comments/d2nwda/inverted_my_regular_t3pa_pedals_that_came_with_my/
I do not know if the Mode switch work with the T-150 as he is using the T-300RS wheel, so here is a video about a brake mod that shows the internals of the pedals.
From that I would say that it should be enough to just swap the cables in the PCB if you want to retain the boxy thingie. If the pedals have different spring stiffnesses You could arrange them to you likeness.
I have have skipped the box entirely and have mounted my G27 pedals directly to a framework with a removable footrest. When I am not using my rudder pedals they are pushed against the frame backwall and for using them I just remove the footrest and pull the rudders out to where I need them.
It is easier to do with the G27/G29 pedals as each has 2 direct mount holes.
Note that my desk plate is 70 cm wide so you may not have room for a platfom like that.
An idea could be to mount a plate with the pedals on to the wall with swivels at the bottom, so it can swivel up to vertical when not in use. And some kind of brackets to keep it in place at the right angle when in the use position.
Something like a flip down bed or desk.
The T3PA’s may be a little more challenging.
If I where to do it I would probably drill a hole at the opposite end from the direct mount thread thingie. If the plastic housing has any function like as physical stops I would cut them out and retain them as well.
I am considering replacing my G27 with a G29.
I have just ordered Leo Bodnar’s G27 pedals and shifter adapters so I can use them as seperate USB units.
It is a UK company.
From what I have been able to determine it is possible to connect the G27 shifter to the G29 but you will not get to use the buttons on it. The Leo adapter will get me 19 functions to assing to whatever.
I have ordered the the Leo pedal adapter because I have swapped the G27 springs to my liking and the G29 has a loadcell simulating curve together with a rubber stopper that I may not like.
With it I can keep the G27 pedals.
Happy Simming