Straight out of the frame means it will not allow for a stock bumper. If its in far enough, I suppose there could be some circuitous way to make the hitch addon bend down below the bumper. They also sell a 81030 that drops below the bumper.

This one:
http://s1312.photobucket.com/user/Deve1958/media/DSC00598_zpse731a8ea.jpg.html

This one lets the original bumper set on top of it without modification and the center bolt on the bumper matches up to the hitch. It also uses the bumpers mounting holes with an added benefit of allowing the underbed spare tire carrier to work without interference. I made it myself since at the time TBRT probably didn't exist. Glad there is a viable offering out there!

Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet