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Ford 400 Modified Performance
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Posted: 08/11/09
02:05 PM
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Ok ladies and gentleman i'm getting ready to start the restoration on my 79 F-250 with a 400 Modified and i'm wanting any and all ideas for performance gains out of the motor. Any ideas? 
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Posted: 08/22/09
04:27 PM
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400 or 351 modified there ok they can be built to be torgue monsters but they are know for weak bottom ends and rear main seal leaks i would suggest and up grade for a lil extra money and more avail parts is a 460 and they use the same bell housing so the trans will bolt up my best friend bought a 79 150 4x4 with 6" lift and 38" tires had a 351m in it rebuilt went thru 2 rear mains in a year and a half and it only got 11 mpg my 88 f-350 crewcab with 460 gets that witha trailer behined it hope this helps sam
we will all have our day in court (tickets suck)
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