Just as slow as before my mods..

Mate don't give up!
You have a great looking car, nothing wrong with the body, paintwork, interior, wheels, tires etc. It runs and drives, you can still cruise around while you get this final part sorted.
Work with the people on here, the hard stuff is already all done, making it go fast should be easy, even if it's done a step at a time over the next year or so.