Newbie Alert !

Hi
Been looking at plunge milling for a job as it is apparently easier on the older machines There is a lot of material to remove (Aluminum 6082 T6 )
in closed pockets 3 inches deep 8 inches wide 5 inches long 120cu/inch so I was going to use an old almost redundant machine to rough it out.
I only have use of Solidcam to program it but it doesn't seem to have the option for plunge mill where you can specify tool pull off on tool retract.
I could fudge it using drill option but no pull off also need to put a fairy large starting hole in the stock to allow the plunge op and not sure the best way to do this.
or
Just set it for a conventional milling and wait out the extra time

Thanks