FWIW,,,,
I've had flywheels resurfaced on a Blanchard grinder and Van Norman fly cutting machine, with no difference.
On my 49 wagon, it uses a larger clutch. Had problems when I purchased the car, and had the trans / clutch out a few times.
Replaced the motor mounts and transmission mount. Used new fasteners too.
Resurfaced the flywheel, and checked for runout when I reinstalled. Used a stainless steel washer that fit over the flywheel bolt circle area. Used new ARP fasteners for the flywheel and the PP. Those removed were junk. Throw out bearing is another story, went through two of them, sad that some bearings are junk. Checked the spline shaft for any burrs. Align the disc carefully so it is centralized in the rotating assembly.
Made 'transmission pins' from longer bolts with the heads cut off, so that I could slide the trans on evenly. Once installed, replaced one at a time with the correct fastener, and tightened them evenly.
Check your driveshaft, replaced the U joints, and rebalanced the drive shaft. Used new fasteners and locking devices.
As 48F1 mentioned, check all the linkages for any signs of wear. The 49 shaft that goes through the frame can be worn.
Adjust for 1" to 1 1/2" of free play. I use a tape measure, with one end on the floor/firewall area.
Good luck.