1ton axles, 4.3L, flatbed, full exo, what leaf springs should i use?

[toyotaexo]

I'm building a 85 Toyota pickup with a 4.3L Chevy, 1 ton military axles Dana 60, 14bolt, flat bed kit, full exo, what type of leaf springs should I use with this set-up?
I was thinking of going with a 6 inch front leafs and 4 inch rear leafs.. just because of all the weight in the front end any suggestions? or pic's ...   flex results?
please help going to start my build on my axle swap !   I'll try to post up pic's of my truck as it stands...

[motorider228]

i wouldnt be as worried about not flexing or whatever as i would about axle wrap. Just run some marlin springs. maybe an inch bigger up front and some track bars in the back