Hi,
If your not running yet,,,,,start running now as fast as you can! The fact this vehicle has had 10 previous owners should raise the hairs on the back of your neck. Rust is the death knoll with these vehicles. The normal formula for rust is quadruple what you can see to realise what's there and thats being optomistic. I think I read on a post here your looking at $3,500.00+ US$ for a double row conversion on the timing chain. I wouldn't even look down the oil filler cap with a small mirror to see which type of cam chain lives in there. You won't get any sleep if you go ahead with the swap, you'll be lying in bed listening to that odd noise in the garage, it will be the subtle noise of rust eating your car as you sleep. Swap a 1997 Turbo for it? I personally wouldn't swap the rear diff out of your 64 Landie for it (and it's the worst part of a landie!). Paint and mechanicals/trim can be fixed, rust can't. Joggers/sandshoes/flip flops/slippers, what ever you call them, put them and run away. My opinion, someone back me up and save this man!