Flywheel for C4 behind 5.0

What year is your motor? all 5.0L are 50oz, some of the older 302's were 28oz

Your damper and flywheel need to match the inbalance of the motor

the more common term to use is "flexplate" instead of flywheel when you refer to automatics. It does depend on the year of your engine, and if you are using a newer 5.0/302, you will use the 50oz flexplate and harmonic balancer setup. All 302's before 82 (I think) use a 28oz setup. Make sure when you order your flexplate that you get the one with the correct amount of teeth too, there is 157 tooth and 164 tooth. The 164 tooth is bigger and uses a bigger torque converter.