Can it hook?
The 904 and taller tires will be a big help. 4 spd's are a ton of fun but unless you have Ronnie Sox ability getting one to hook is a real chore. I don't see a problem hooking with the new combo. I don't know the torque of my 408 but I bet it's close to 500 and it hooks pretty darn good considering I just have HD springs, no snubber, soft bars, 90/10 shocks or any other sort of traction aid. All I did was slap on a set of Nitto drag radials.