Re: The question 400 or 350???
If it is a 400 you can tell by looking at the flexplate. It will have a weight on the inside of the toothring. As far as telling if it's a 350 or a 305 you have to decode the block code.
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86 SWB 9.0 LITER
T-400-OD 4.11 eaton-4/5 drop
Best 1/4 12.51 @112mph no traction
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