Mark, rumor has it you bought a new/used Mustang for your B/A effort. If you're looking for a new 500 CI motor and have $125,000.00 try this:
http://www.racingjunk.com/Drag-Racing/2282125/ROUSH-YATES-FORD-500CI-PRO-STOCK-ENGINE-1400-.html
http://www.racingjunk.com/Drag-Racing/2282125/ROUSH-YATES-FORD-500CI-PRO-STOCK-ENGINE-1400-.html