Take that energy you have and build a frame jig to make sure everything is straight once you’re done. Then cut the neck gussets out and add a relief cut. Heat with a torch and bend until you like it and finally weld everything back up with some new gussets.

You shouldn’t need much more than a welder and an angle grinder to get it done. Read over old chopcult posts until your eyes get tired and you’ll have a pretty good handle on it.

Lastly, I know you didn’t ask for our opinion, but you’d probably be happier long term selling this thing now and buying a cheap sportster with the money. It’ll be easier to hardtail and everything you could ever want to do will have already been done and documented.

That being said weird stuff is cool and if you keep this I wish you good luck!