Bang on the money there. Tis indeed a Boulder.
I'm amassing parts for it now. Going for a nice period build with lots of nice NOS XT, all black with a few splashes of white. It should land on Tues or Weds next week, I'm going to build the wheels for it this weekend if I get a minute and try and have it ready for the next RB meet down Yorkshire way at the end of February.