Burner, i love those tanks! lots of people use them for xs650 café projects but i've never seen one on a 350!
Troy, ya, make it fit... you should see what i had to do... pounded out the bottom to stretch it over the frame, and then kinda opened up the whole thing at the front to fit over the stock mounting donuts... there was a guy who got an RD tank onto his 350 that did WAY more work even than me... and there's guys who have split tanks etc... to quote starsky (or was it hutch?) doit... doit...