I was searching for a zero balance 157 tooth flex plate for a big block six cyl ford project I am doing and was told that Ford never made such an item for a 240/300, that it only came in 164 tooth. Then I found a company in michigan that not only could supply me with the 157 wheel but could give me two choices both SFI cert. starting at $57.95. After talking to these people I have came to beleive that they have the best selection of flywheels and flex plates around. They also sell other performance parts but mostly for V things. Their main bussiness is transmission parts. I have never been to their place but received excellent service over the phone. They might be worth a try.
D&E Performance Parts
654 E. 10 mile Rd.
Hazel Park Michigan 48030
1-800-245-9754


Been there, Done that, Hope to live long enough to do it again.
Big Bill
I.I.# 4698