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Using a cat is the more responsible thing to do--so as an air breathing organism I thank you. The thinner gasket will net you a bump of almost a half point--getting the ratio over 9:1. You may even be able to use the mid grade gas with that--especially if your gasoline (like ours) is 10 or 15% alcohol--a very effective antiknock agent. Lots of bench space for large items and baggies are in order. Of course, if the cam is worn, now (with the head off)is the time to change it. But here's a thought, since you are concerned about cost (who isn't?) and have reservations about taking on a big project. Why not slow down and live with the car awhile. You can learn its strong and weak points (relative to your needs) and make a plan for work to be done. Winter's still with us so maybe you'll want to limit use in rough conditions. This is the best time to take care of the cosmetics and upholstery, tires and exhaust. When you do take it apart (the motor) you may want to take it further--why open it twice. After owning/driving it awhile you can better determine the level of performance you'd like to see out of it. Best of luck--Dave
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