Gearbox Codes

[Stuster]

Hello!

Very quick question. I have a ‘71 Cali early bay with a CA code gearbox. I have a CU code gearbox sitting in the garage- is the CU code box compatible with the early bay?

 

[sparkywig]

CU code gearboxes are 1976-79MY 1600 bus fitment, and a straight swap for a CA.
They're almost identical to CA 'boxes apart from a slightly higher 1st gear and a slightly lower final drive.