Jomar P51 & SCJ Stud Girdle Difference

So years ago I bought a Jomar stud girdle off a member here who said they were for the FRPP SCJ heads. It is labeled " Kasse P51/SCJ" and "1142". From what I read the 1142 is for P51s only. I installed one of them on a head last night and it fit nice. Is there something I'm not seeing as to why I shouldn't run the 1142 on my SCJ head?

The valve angle or location is slightly moved on the P51 from what I recall.

1142 is the correct number for a P-51 JOMAR girdle.
The ones I have on the shelf here have P51/460 on them along with the number..