Scoop question

I have a dual snorkel I recently purchased to put on my 66 Barracuda, but I need all the studs. Is there an actual part for this and advise on how to install the studs being the holes are drilled without threads.
#1 and 3 will look good, leaning toward #3 for ur body style, will be easier to make fit also. # 1 will be somewhat of a ***** to get perfect.
been there done that w/ a snorkle! is the prostock scoop fiberglass or plastic ? -------------------------------------------------------bob:banghead: