The ZRT1 chassis was built from 95-98 and I believe they all had a steel bulkhead. The ZRT2 chassis was built from 99-02 and they had a aluminum bulkhead, that was very similar to the ZR3 bulkhead. So I would say if u were using a 99-02 bulkhead it would be a fairly easy project. I'm sure u could use the steel bulkhead as anything is possible but y would u want to use such a heavy one, when there motors r heavy already.
Sprocket
PS u could ask Idcatman1 or Idcatman3 and they could give u some more insight into this project.