[cas3]

Kube, you cut the "blob" I call it, off all your flywheels? I do too. Two reasons, one, the writings of late great Rumbleseat, and Bruce Lancaster, thats the lightest "Ford "flywheel you can have without buying some aftermarket piece. Two, I have a lathe, so its fun and has no cost. You, a retired tool and die maker..I assume you have lathe at home too, So no cost. In the real world, I doubt the corner gas station that put the last clutch in in 1965 or so, would recommend the customer to pull the flywheel and send it out to a machine shop. The OP's car seems pretty original, so my statement would stand unless someone put a truck motor in with an 11" clutch. Not likely on the OP's car. The 9" flywheel with the blob cut off is a remarkable difference. They wind up fast, and decelerate fast, making shifting easier and you think you gained a bunch of HP.

Henry, and the rest of the industry at the time, believed in heavy flywheels. Model A's are 60 lbs! I forget the v8's, and what you loose by cutting off the blob, old brain seems to delete more than it takes in these days!