Car insurance on Hemi swapped cars

Right now I have Haggerty for Comprehensive only. I just got a real nice 64 Valiant that needs to be finished. I put it in a storage facility, which requires insurance on owners contents. I insured the vehicle for $10,000 no deductible. Cost was less than $10/mo. I had another 64 Valiant that I needed to remove the front and back windows, so I put that in storage, also. Haggerty covered that car also ($4,000) at no additional premium.
PS: The storage company has their own insurance you can buy, but actually fairly expensive. $12/mo with a $500 deductible, and $4,000 max coverage per storage unit.