Weld In Frame Connectors

I have a pretty nice 68 GTS. I was wondering if it will hurt the value of my car if I install a pair of those 3 sided frame connectors that weld directly to the floor pan? You don't have to notch out the floor pans with these. I'm not a purist but I think they will help the car in the long run retain it's structural integrity. I do run it at our local drag strip and attend lots of area car shows.
Thanks Jeff