Question about built and blown 98

[01s281]

I am going to go look at this mustang tomorrow. Do you guys think I should be worried about the mileage even though it has a forged engine? guy has all the paperwork and reciepts. It was professionally built

http://cgi.ebay.com/ebaymotors/ws/e...70226830880&ssPageName=ADME:X:RTQ:MOTORS:1123