Will this setup be to much for a stock eaton?
yes, its too much for a stock eaton.
Ive had that combo for close to 6 yrs with no issues accept broken drivetrain parts.
A #4 lower right now will just give you a ton more torque, makes part throttle on the street a lot of fun. Yes it will be out of breath up top, mine made 460rwhp 510rwtq with that pully setup unported (upper only made 455rwhp 475rwtq) and trapped 122 at the track with alittle ice. a 2.93 upper #4 lower is very popular combo also but the difference isnt much when you look at a blower speed chart. Either way its been proven over and over you can spin the crap out of an Eaton and it will live just fine, may not make great HP but the torque is fun!
Wow! 510rwtq? that was 2.93 upper? doesnt sound like a bad deal. didnt realize the lower added so much torque. especially now i may have to wait for my TS. hearing a knock in the engine.