A SPF GT40 will run you north of $120K to put in a good power train. One was at Barrett Jackson last week for $132K (which would be $120K plus the 10% fee)
1966 SHELBY Lot 1245.4 | Barrett-Jackson Auction Company
Ignore the Shelby stuff, it's a SPF car. I sincerely doubt the Shelby tagging added any value. I do like the Tungsten gray/silver color. It was my first choice for the FGT but the Heritage was the zero'th choice that I thought would never happen but did.