medalist tools of course!
no point buying trade quality general tools unless you are on the tools all day. the prices of basic stuff from the top brands are crazy.
but do spend money on the torque wrench....warren and brown for me, much better than the light spring style wrenches that most brands use.
I mentioned elsewhere....go heavy duty stand not light, these motors are long, and heavy, and move around a terrifying amount even on a good stand.
other than that not a lot of specialist tools required for a one off build. piston ring compressor to get them into the block. ring expander to get them onto the piston. and lots of scotch brite pads and pipe cleaners and rags to clean everything