yeah its done all the time. even jesse's car has like 120 or 140k? and i know countless others. just compression check/leak down check, u might be good to go. my motor just hit 100k 3 days ago, i dont plan on rebuilding anytime soon. however that spare block in my garage will eventually get built.

but if u are shooting for more than 275-300whp on a stock motor be weary if u have lots of miles. for 230-270whp, you should be fine as long as ur giving it enough fuel and got it running right.