I use shippo.com that gives you pricing for UPS, FedEx and USPS. I just shipped an '86 3.2 exhaust system to California. Removed the muffler, two bike boxes later, the heat exchangers and cat was $121 and the muffler was $83 through UPS. Both much bigger and heavier and traveled farther than your Fiat parts. Congrats on them BTW, I hope to have my '70 Spider running this spring.
