The Arrow has a Dana with 4.56 gears, which would normally be fine for the track, but not much good foe street cruising. I'd like to put 4.10 in it, it has a spool, will need spacers or any extra pieces? I have no clue when it comes to a Dana all help would be appreciated.
John

You are going to need a different spool for that. 4.56 and up use a different spool than 4.30 and down.

The only exceptions are:

All pro gears, regardless of ratio and Richmond 4.10 street gears take the 4.56 type (5 series) spool.

Yes, you can re-use your original 5-series spool if you install Richmond 4.10 street gears or any pro gear.

Thank You Doc!!!