Sounds like a great project! We do many of these each year for tractors, luckily, the 466 has really good stock parts. With a good pump and turbo, 1000 hp is achievable with some stock part mods.
Here is what I would recommend......
-balance rods and crank, recondition rods -cut pistons for valve reliefs -regrind cam -cut sleeve for fire rings -bowl job, springs, new hardware for cylinder head *this would be the basics with stock parts* I would run a 2 stage turbo setup on this no problem, we are actually building a DT360 now for a 1970 Ford crewcab and it will be 2 charger as well.
New stock bolts are fine for head, mains, rods, etc...
Give me a call to discuss this if you would like, we can talk about all pricing options, assembly, details,etc..
thanks for the inquiry!
Brent