GRANTURA TO GRIFFITH CONVERSTION

[tuscrv8]

i have come accross a 1965 1800s grantura and was just wondering how hard it was to convert this into a griffith replica
i have restored a lot of cars in the past and i am just finishing my tuscan challenge track car
just been looking on ebay usa and ford 289 engine seem very cheap starting at $150 and going to about $2500 for a fully rebuilt 350bhp engine and with todays exchange rate thats a cheap engine . would it be a viable thing to do or would i be commiting financial suicide

any ideas