Hi, need some advice on what is the latest model pan that will bolt to 56 oval with out to much mod. Car is for my daughter so would like disc brakes and IRS? Thanks John.

Have a look here

http://forums.aussieveedubbers.com/viewtopic.php?tid=8392 

It is a 63 to a 68 - but same same

A 1976 pan is what you are after

Hi there,

I have a 57 Oval mated to a 69 IRS floorpan with 4 wheels disc brakes. I bought it that way but it is my understanding that it was originally set up by V Force in Sydney (Mortlake maybe...) so they might be a useful source of info for you.

Best of luck with it.

Kris.