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so what makes this so much different from a typical 2.7 build? I dont think I've ever seen anywhere NEAR 400 hp from a 2.7. I thought hitting 300whp was tough and 400whp should be close to what...320-330whp worst case scenario?
Please remember that this is a race motor.
Big compression, head and cam pakage that would not be happy on a street car, ITBs, Race gas, etc.
I'm pretty sure with a few more changes I can make 300 at the wheels, never thought about 400!!! That's awesome, and your definitely working with the right shop!!