Gene Hepler had bought a FC-170 DRW to rebuild and like most of us, couldn't find parts needed for his restoration.  Specifically, the Radiator Surge Tank for his FC-170.  He ended up making  tanks for himself at his Fabrication shop and Gene was kind enough to share his product with the FC community.  He has tanks available for both the fc-150's and 170's.  Contact Gene at the link below for prices and availability.