UPDATED 5/23/16 - This is an easy one for those of you looking to add a bit of S/C or race car appearance to your build. The original race cars had this row of reinforcing rivets added to hold the leading edge of the hood skin to the inner hoop / tubing that formed the hood structure.
Original post follows.......
Drilled my hood for the leading edge ring of rivets this weekend using a pattern that is similar to a couple of the S/C cars I've photographed in the past few years.
All are 2.5" from the hood opening, so about 2.25" in from the edge of the hood. The front row is nine across, evenly spaced, with the ones on each end set 3/4" further back on the hood. I wanted to use the same spacing for the sides, so I only did six on each side instead of the typical seven.
One thing my research turned-up is that there are quite a few "correct" ways to do these... I just did what was asthetically pleasing to my eyes.