yeah that looks pretty good. we used a small (2") pneumatic grinder to get it even more clean with a 1000 grit Emory pad
make sure to vacuum out the top of the pistons to get rid of any gunk.
lastly- be VERY careful with the connector rods from the rockers to the lifters- we had the one closest to the firewall accidentally slip off the lifter and almost down into the block. NOT fun. we discovered it about 1/2 way through the torque sequence.