So here is what i came up with so far, I need to weld the chute pack mount to the top member, but you get the idea. Hope it works.
I tried to keep the mount location to the chassis close to the vertical CG, and wanted to be able to remove the pack from the tether mount so it is a separate piece that will hold the chute pack and remove by a pin. Technically I think this is not accepted by NHRA (the fact that it can be removed by a pin) but technically the speed is not high enough to mandate the chute anyway, so I went with function. It also had to clear the hatch to open. I sectioned the bumper to tuck it in, and notched the center of the bumper for clearance of the mount.