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Do 400's run good ?? Well my son has run 11.40' @ 117 with his stock stroke 400. It's a mild build with stock Eddy RPM heads and the MP .557 cam.

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is he using a steel 383 crank, or did he use a cast 400 crank? does it make any botton end torque, or does it like higher rpm's?

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Yes he uses the 383 steel crank. I would have no problem using a cast crank on his 400 but we had the steel crank laying around and decided to use it.
Yes it makes good low end for what it is. He uses 3.91's and the Performer RPM intake which has great low end. He tried a single plane and went no faster but he said the RPM intake felt so much snappier on the low end. And it like's to wind up as he shifts around 6700 RPM as that what it seems to like but he really needs more gear to get the trap RPM up. His 60's are in the mid to low 1.60's with a 1.61 being his best. Its a street car driver that we just figured we would try the stock stroke 400 since we had a few laying around. But like Zippy says the 400 with the 440 crank (451) is a real nice combo that will be the next eng his Dart gets. Ron