Does anybody make a transverse bar for a 280z that go behind the lower transverse bar??

Len, your question can't be understood. There is a transverse link on the Z's, often called the lower control arm, and there is a differential case mounting member ,often called a mustache bar, but there is nothing called a transverse bar.

I can't understand it either.

I have a r200 diff and bought one of those finned covers. Now my transverse link will not go around it. (The bar that goes behind the diff.)

I was wondering if someone makes that item so I could use the finned differential cover.

Sorry about the poorly written post but I was getting distracted by the kids.

There's a guy on Hybridz who makes one - Steel Brace for R200 CLSD Finned Cover in S30; New List and design... - Vendor's Forum - HybridZ

You bought the cover but not the CLSD that goes with it?

I got the whole package a r200 clsd. I paid or it but what the heck those things are very rare, I couldn't pass it up.

By the way thanks for the info

heres is a set up on one of my Z's. i have the R200 LSD 4:37 gearing from a skyline. polished finned cover fit and cleared with no issues