With 275,000 miles I would NOT just put a new head on to keep it stock. I bought my 4Runner with a blown head gasket at 250,000 and just put a head gasket on to get it going. 4,000 miles later I started to get a rod knock. So I decided to rebuild it myself. I found a machine shop that builds street drag Honda engines because they were the only shop I could find that could torque plate bore the block. I bought a LCE rebuild kit. Had the engine torque plate bored. Balanced everything including the flywheel. Decked the block and machined the head. Mild port work done. 1mm bigger valves installed and used ARP cylinder head studs. Also installed mild cam and stiffer valve springs. Put the engine togather myself and am very happy with the results. It was a lot of work and money ($800 for machine work & $1200 basic rebuild parts). After the rebuild the truck runs smooth all the way up to 6,200 RPMs and idles smooth too. It has been over 30,000 miles and still running strong. I rebuilt the engine years ago before I found out about the 3rz swap. If I were to blow a motor now I think it would be cheaper to install a used 3rz, ether way it's a lot of work.
