Frame Drain Holes

I did 1/2" at the rear as pictured above.

Yes,you really need to go up to 1/2 hole,watched a vid where a guy had to go 1/2 before the frame would drain,but I drilled them through the top hole of the control arm brackets where it was more supported.
 

I used a drill drain cleaner from harbor freight w/2 sections of light chain on the end,worked amazingly well!