. In a related story, we were preparing mid week to run a 100 lap memorial race, that had a descent pay out. We were prepping the engine for the race, and found an issue with the passenger side head. We looked under the bench for our stash of engine parts and only found a one ported passenger side 305 head. We were in crunch time by this point, so it was decided to go for broke, and install the 305 head. The budget was already gone through with shock and tire purchases, so there was no more money left, or enough time to prep a new head. We assembled the engine, then loaded up the car. We pushed the car to the weigh scale, and opted out of the mud laps. The first start of the car was when we went to the heat race. The engine sounded odd, but ran with plenty of power. Since we didn't go out for mud laps, we had to start at the rear of the field. He quickly weaved his way through the crowd of 10 cars, within the 10 laps. As soon as the checkered flag dropped, he shut down the engine, and was pushed into the pit. We went through and adjusted the valves with it hot, and then let it rest until the feature. For the last race, we started at the mid pack, outside row. When the green flag was dropped, the car took off again. He quickly ran toward the front, and maintained a sizable lead. Over the coarse of the race, the engine did fine. Towards the end of the race, the engine started to puff a bit out of the right side header, when the throttle was released. The longer the race went on, the more the passenger side head was smoking. The lead was starting to diminish, but by the time the checkered flag, the second place car was hot on his heals. He was able to hold them off, and win the race. When we tore down the engine, the passenger bank piston rings were pretty much burnt up, and the crank bearings showed much more wear than the left bank. The difference in compression between the two sides, made the engine unbalanced. It was a good test of theory, with an interesting outcome.