google is your friend
Really?
Do you not think that I tried google, partsgeek, carparts, Ford, AZ, Advance, ORiellys, FordSix, Ebay, FB marketplace, CL and a bunch of other websites looking for the p/n and/or a flywheel before I bothered to come on here and ask for help?
I spend whatever time it takes doing research when I need an answer. I only ask for help when I am at a dead end.
The 250 uses a zero balance 157 tooth flywheel. A SBF uses a 28oz or 50oz imbalance flywheel.
If I cant find a 250 flywheel I have four choices.
1. Buy a SBF flywheel and have it machined to zero balance. Not cheap
2. Buy a SBF flywheel that has removable weights. Not cheap
3. Buy a 300 flywheel. The 300 is zero balance and 164 tooth, so different bell and clutch. Not cheap
4. Install a C4. I own everything to convert from manual to auto, so no cost.