| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| QUALITY-BUILT | NCV6521A | Direct Cross Interchange | 4 |
| FENWICK | NCV6521A | Direct Cross Interchange | 4 |
| SURTRACK | 800197 | Direct Cross Interchange | 3 |
| SUR TRACK | 800197 | Direct Cross Interchange | 3 |
| SUR TRACK | FD8003 | Indirect Cross Interchange | 1 |
| MasterPro | FD8003 | Indirect Cross Interchange | 1 |
| SURTRACK | FD8003 | Indirect Cross Interchange | 1 |