You don't have to cut anything. The carpet strip has clips that easily bend to undo it. The clips are worth saving. I don't believe they are available with reproduction carpet. The reflector is attached to the cardboard under the carpet. The wood grain insert has small nuts holding it into place.
My 70 Cuda doesn't have that dent. This neck isn't dented either.
1970-74 Plymouth Cuda Fuel Tank Filler Neck Mopar Gas Reservoir Cylinder Sleeve | eBay
This has been in storage for many years, making it a good core without shaft wear. I'm asking $200 + actual shipping costs from South Florida. I can be reached by PM.
This has a small cut in it. The warning light lenses are good. It can be repaired or used for parts. I'm asking $20 + actual shipping costs from South Florida. I can be reached by PM.
These do not fit the 70 Challenger standard gauges with the ribbed trim. I'm asking $25 ea. + actual shipping costs from South Florida. I can be reached by PM.