These heads were cleaned up with valve job and new Manley valves in January 2010 (see invoice) by Champion Performance (do not get them confused with Champion Racing Heads). However, Champion Performance is one of the best shops in the Metro Detroit area. I did a mild port job on them to open them up a little. Springs are aftermarket and were already on heads before I took to get work done. Since the head work only about 1000 street miles were put on the heads. In May 2011 engine was pulled. I am only selling because I am building a stroker with GN1 heads. With these stock heads, stock cam and TE44, engine pulled 422 whp on poor tune. I was running T&D rockers on them so the stems have been modified to accept aftermarket rockers. T&D rockers are being used on my new engine. Of course stock rockers will still work and I have a set if the purchaser would like them. I am asking $380 plus shipping. This is half of what I paid to get them redone. I will be selling other items, such as stock valve covers, RJC valve cover spacers, Std bore 109 block, turbo crank, etc. I will create another thread for these items soon.