Th350 vs th400 for pro street 70 Electra

Discussion in 'The "Juice Box"' started by JayZee88, Oct 15, 2018.

  1. JayZee88

    JayZee88 Well-Known Member

    My 70 Electra has deep gears (2.93). I am keeping this rear under it until I blow it and swap it with a ford 9 inch. I'm wondering what y'all think of swapping the 400 for a 350 for a full roller 600hp 455. It will cost more to build and swap a 350 for the 400, but the gearing is more friendly for higher rpm, less weight, and less rotating mass is my train of thought.
  2. Bigpig455

    Bigpig455 Fastest of the slow....

    600 hp, 4500 lbs and a 2.93 gear is a tough environment for a TH350... you could build one to hold together for a fair amount of money, but I'd guess you'd be back into it fairly often..Honestly I'd think the TH400 is a better bet, parasitic drag, gearing and all. We know GM did...
    johnriv67 likes this.

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