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Discussion Starter · #1 ·
do i need to use a specfic year motor for it to work under there?? i want to end up with a nice 383 and a 700r4. i did a 93 fox swap from a 4cyl to a 347 several years ago wasnt that bad. any advice on what would the easiest route would be a huge help.
 

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The ONLY thing you have to make sure of is 55-85 small block take 1 flexplate, 86-up take an external balanced flexplate, and the 383 may take one from a 350 OR 400, the 400 flexplate was an external balance piece.

I have never really checked into whether the external balanced 400 and 454 flexplates were balanced the same as the 86-up 305 and 350 pieces, but they may have the same balance weights, I'm not sure. All might just be different to their own, I know 86-up 305, 350, and 4.3 V-6 pieces will interchange.
 
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