If they are UL wheels they have a different casting number ending in 37. Unless you plan to do some other mods to your pan don't bother with them. And if they are lightened they are worse due to loss of low end torque.
Be aware that both 61ci and 74ci flywheels have the same casting numbers. You need to measure the stroke to be sure. The lock tab screw hole is also in a different place relative to the crankpin as the nuts are smaller!
Robbie
Be aware that both 61ci and 74ci flywheels have the same casting numbers. You need to measure the stroke to be sure. The lock tab screw hole is also in a different place relative to the crankpin as the nuts are smaller!
Robbie