'04 MasterSbilt minimum rear percentage?

[double4]

Limited motor (425ish HP). I'm looking to drop most of the lead off of the car? Any thoughts on spring combinations? Minimum rear percentage? Racing on a 1/2 mile tracks...

[janke27x]

on my 03 I ran last year on a 1/2 weekly ran 53-54% rear with a 175 left rear spring behind with a pop-up shock and a 250 spring on the right rear. 350 on the right front and a 500 on the left front