what axle size to fit 345 tires?

[evilchevy]

I'm redoing all my suspension on the 69 camaro.
I will probably go for a G link system with minitube.
I want to fit 345 tires with large lip wheels.
Do I need to have a shorten axle and if yes what is the best length for this set up???

[J Demuth]

I don't know if this will help or not, but this is the info i got from Detroit Speed 4 335 tires.

For an axle length (axle flange to axle flange) you will want to have it be 54.750”. This is from the outside edge of the axle itself and does already take into consideration the thickness of the brake rotor. The listed axle length allows you to run an 18” x 12” with 5.500” of backspace.