g'day yall!! just a query, i'll find out the answer on sunday when i see my kombis, but i gotta know if a later crossmember will fit an earlier bay.

i've dropped the 1800 out of a 76 bay, and its going to go into my 72 bay that has no crossmember. the crossmember i've got has two bolts either end to secure to the chassis rail, and the chassis rail on the 72 bay has three holes set out in a triangular pattern...

anyone know off the top of their heads if these two will fit?? thanks all!!........