Captain Crash
the Silver top you got is between a gen 4 and gen 4.5 .. you will need the new crank 21-0907T-03 and Rod 21-0600 to rebuild that engine properly , there is no rod that will fit hat engine unless you can get an Original 28-0600 which is pretty rare now, not many places will have these in stock.
The GX you can get a 21-0600 rod as replacement.
Cheers MM