The FRPP pins are definitely not long enough for the Steeda 1995 Cobra R hood, which is what I have.
I did not want to weld the nut, so I drilled a second hole into the pin, higher up on the pin, using a Roto Zip and several special drill bits.
I don't have pictures yet, but it looks good.
Later, I found some chrome-plated hood pins, made by a different manufacturer (I forgot which), which are significantly longer. However, I'll probably stick with the stainless steel FRPP pins.