hood pins? length and diameter?

Hey guys, gotta order a set of hood pins and im wondering what size pins you guys are using?
I have the factory dimples and i have options for 3/8, 1/2, and 7/16 hood pins and id like to go with something stock sized...also i need to know how long the pins need to be for a stock hood (71 scamp)...is it 3, 4, or 5 inch?
the sooner the better because i have to order these pronto!

Thanks guys!
Matthew