On my modified 69 Mustang shifter, I had nothing added as a "reverse lockout", nor was I ever asked to . It is a factory shifter, if NHRA required a 2 handed reverse lockout, even a bone stock 17 second street car would be technically illegal. As gt350hr mentioned, to engage reverse requires pushing the button in the shifter handle, besides, if you have a 5 point safety harness, and are properly buckled in, trying to get both hands on a floor mounted shifter would be rather difficult. I have seen some people add something like a gate latch, or door hinge as a interfering "lockout" on an OE shifter, which looks like crap.Also, what about cars that retain factory column shifters? Several years ago, Phil Featherston brought his original 64 Thunderbolt to Mission for the Mega Ford race, and his mid 9 second T Bolt still has the original column shifter.