We have the same stroke your looking to build, have run it for years with no issues. We just need a bit more power so, bit more bore size, new cam, Dwayne doing some head work and we should get what we need. You wont have any piston speed issues to worry about , we have turned this one 7200 many times with no issues.
Bearings we just took out after 3 years still look new and crank journals look like mirrors , rod bearings all looked good as well. I wouldn't worry about piston speed on your build.