In fairness to "Detroit Nasty" the bores are are smooth (MMC and non serviceable). The head also shows clean burning and sealed surfaces. This engine had an estimated 100k + and was abused in the Celica GTS.....but CORE was good! I added new rings....some say a no-no....but VERY happy and have over 1,000 miles on rebuild and works PERFECT! PPE dual exhaust....maybe a little to aggressive for me, but when VVL kicks in it is INSANE!