If you do a 426 Twin Turbo, be prepared to drop a LOT of money on upgrades. It's not as easy as just throwing an engine and a TT setup on it. If you wanna turn it up, be prepared to buy quite a bit of upgraded parts.
if i order a long block 426 i need more part i mean for the engine becsoe it will cost me 10260 do u think i need more part for the engien or if i order the full engien its will safe many bescoe its will come a compleate engien