Gen III Hemi

The trans will bolt right up. Just need a flexplate from ATI or Bouchillon. The car hemi cranks have a ring pressed into the crank register that has to be removed. Weld a nut or whatever to it, then use a slide hammer. Block will easily handle anything N/A. They'll still handle a considerable amount boosted. 6.4 all have forged cranks, so you're good there. I don't know the limits of the stock floating rods, but, I'd guess anything after 7000 RPM is a gamble. No real need to go solid roller, unless you're looking to spend a metric **** ton on valvetrain. The stock rockers and good juice lifters will live at that 7000 mark. I'm not sure if anyone makes a drop in solid roller lifter. Guys have bushed, keyed for different pieces. The cylinder heads flow like a mother. If you had that engine in car that was a 1,000 pounds lighter, easily be in the tens. And the engine wouldn't really work too hard.