Suby axle and DOJ cv issue., 25 splines to the diff, 30 splines to the axle. What CV is this? Options

[ruby914]

I put a 02 WRX motor in my 914 and have a MY03 TY754VN2BA trans staged for transplant.
I needed inboard CV’s so I went down to the local pick-a-part and got CV’s off of a 99 Legacy.
One CV was green the other was black. More so the black had ball and cage, the green had the tri roller setup. Both CV’s had the 25 spline count so I felt all was good.
Next, I sent a set of 914 axles with the inner race from the black CV to a machine shop to have them re-splined to fit the inner CV race.
When I got them back they fit great. Problem is the green CV has a different spline count inside the CV. I didn't notice this before.
ID on the green is 9 SFJ 82 NTN A R 3 T 29 splines to the drive shaft "trunnion" (inner race).
ID on the black is DOJ 87 AC NTN 30 splines to the drive shaft.
So my axles were splined for the DOJ 87 AC
Was this a mistake? I have searched the net and can’t find what model cars these fit. Can’t tell if it was proper for the car it came from. I think not.
I would hope to have chosen something common.

Anyone have an idea what cars these come from?
I would like one more DOJ 87 AC to get the project moving.
Maybe I should I re-spline a 2nd set of axles to something more common?

I am a little confused here. I think it was after 04 that the CV had shafts to the trany and the inner race "trunnion" was 30 splines. Did any of you do axles for the 03 and what spline count did you use?

[76-914]

Whichever one you use will be stronger than the Type4 CV.

[ruby914]

Whichever one you use will be stronger than the Type4 CV.

After all I have found on CVs, I am starting to question if this is correct.
All this work looking for the CV to fit a 30 spline shaft lead me to Subaru Hi output applications.. Legacy TT, STI, JDM. Even with this larger DOJ 87 AC on the inboard side, the balls are only about .660 where the Type4 CV has something like .675.
Outter race OD is about the same.
The guy I got my DOJ 87 AC from had 1 good one out of 3 from his STI.
So if his STI is AWD and we are feeding the same power (give or take) to two wheels, wouldn't we need something considerably stronger?
I am starting to think we just have not seen or heard of the Suby CVs breaking on the 914s yet.

After breaking an inboard CV on the 901 trany and beating the life out if the starter, I am also starting to question the "CV fuse" thinking. That may still be good if your racing but I would think on the street your tires should be a good breaking point?