Front coilover conversion size

I am redoing my front suspension & have redone my lower control arms for captured urethane bushings instead of leaving the stock pin & hex design in & making more mods to them & to the k-member & adding brackets & re riveting.
Now on to the point of the matter :

What length of coil over shocks are you guys using ?
I am fabbing all my hardware ,so I don't really care about anyones kits .
I am not using the stock shock mounts & I am installing 1 5/8 front supports strut tubes from the firewall with shock mount tabs .
I was looking at a 12" instead of a 10" . for more travel .


I am waiting on the coils until I have all the weight on the front end .

63 Dart small block with lrg BP discs.

Anyhow let me know what you are using .. Thanks