The 157 toot Fitty ounce flex plate is low cost got mine delivered to my door for $54, Ordered Friday got it Monday .. they are just 30 miles from me though!
So do I throw a wrench in this thread? The crank decides the inbalance not the block. new cranks (50 oz) will fit in old blocks and old cranks (28 oz) will fit in new block as long as the oil slinger is machined off.
http://cgi.ebay.com/Ford-SFI-Flexpl...ryZ33732QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Check at the bottom of this they have their phone number I called and ordered mine over the phone using a Visa Gift Card