Swapping rings isnt all that hard in the car. drop the oil pan and girdle. un bolt eht rods from the crank. unbolt the crank and drop it out. un bolt the oil sprayers. Get a friend for this. One person go under the car and the other take the wooden end of the hammer and push the piston out the bottom. have the person under the car try to not let it hit the ground. when you got your new rings on bolt in the sprayers and bolt in the crank. now make sure you put rubber caps on the end of the piston bolts so they dont scratch the crank. you will need a piston ring compressor to get them in. Make sure to torque eerytihng properly.