Hot Mod 367
#17
#19
Nova rods usually have a number etched on them somewhere. R3, R4, R5 and R7 are all the same size and interchangeable. R6 is the same size but has no upper bushing so it requires a special wrist pin. A WS7 rod could be any of those (except the R6) depending on how old it is. If it's a really new one it might just have RB etched on it in which case it's probably an R7.
#20
#21
Nova rods usually have a number etched on them somewhere. R3, R4, R5 and R7 are all the same size and interchangeable. R6 is the same size but has no upper bushing so it requires a special wrist pin. A WS7 rod could be any of those (except the R6) depending on how old it is. If it's a really new one it might just have RB etched on it in which case it's probably an R7.