by the look of the pictures below the Harpoon attaches to the pylon without any special rail so you should be able to attach it straight to the normal kit pylons (the missile itself seems to have a slightly raised mating surface between the main guidance fins)

http://images1.wikia.nocookie.net/__cb20101017214242/military/images/1/1f/AGM-84_Harpoon_(SLAM).jpg

http://www.fas.org/man/dod-101/sys/smart/agm-84-980220-N-0507F-001.jpg

http://www.designation-systems.net/dusrm/m-84.html

By the look of this review the pylons are on the sprues in the 3rd picture up from the bottom

http://www.cybermodeler.com/hobby/kits/rm/kit_rm_5850.shtml

For the AIM-7 i'd just put them on the cheek stations/bottom of the intakes.  This picture seems to show every option for AIM-7's but the 2 in the middle near the main wheel bays would be easy to mount.

http://2.bp.blogspot.com/-miBqC5w7zbs/T3Vr8-5jN9I/AAAAAAAAAvs/tHrd6FGdPDM/s1600/FA18_IRST.jpg