8.8 swap yoke question

Context: swapped out my 7.25” rear for an Exploder 8.8 rear. Previously I had a slant 6 904 transmission in and a 7260 yoke

Two things. The flange from the 8.8 is in need of some yoke or converter. I have no idea if my driveshaft will even work but wont know the shaft length needed (to order) til I drop the engine/trans back in and find the distance to the flange.

Do I need an adapter yoke? Should I order that first and then measure for driveshaft length?

Anyone have recommendations?