Mine is an old HD-spec race tank. Hacked off the stock Savage front frame mounts and didn't look back. For me, the rear mount is the issue, as the front I just drilled the frame and through bolted.
Tank as salvaged from the scrap tank pile at work...
Primed and front bolted on...
Painted and installed, still needs to be topcoated, the flat black looks cheap...bike is still devolving...
If you've already paid for the bike, make it yours. I've been cutting up perfectly good bikes in order to make them mine since 1987. Holler if you need help.
-WD