roll cage/bar mounting points on frame??

Hi, its ford powered but not a ford..Sorry.. What I have is a 1964 International 4 door 1/2 ton short bed truck. I've stroking the 466 ( that pulled it to a 14.5 - 1/4) I have had in it to a 545 and would like to add roll bars/cage to it. To weld the roll bars to the frame I'd need to add out riggers channel or add frame extensions to mount the down bars to so the down bars can go down closer to the inside panels. Whats the best way to do this? Pictures would help
Thanks
Tim

couple photos off the net..

thanks that helps greatly.

Cab raised up to weld all the frame/cage joints......



Cab back down to weld the outriggers to the body's rocker panel sandwich plates.....



It's also a good idea to install smaller OD diagonal bars running from the main hoop (at/around the seat bar attachment point) & main windshield bars (at/around the dash bar attachment point) diagonally down to the factory/main frame rails. This helps to spread the load around over a larger area so the outriggers don't have to do all the work alone. Adding the diagonal bars also increase the cage's ability to withstand side loading forces.