casting number help
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New User
Joined: Mar 2010
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casting number help
ok im new to this and not very sure what to do but i bought a 74 f250 about a year ago and it has what im told a 390 in it but i cannot find anything with the numbers im getting off the block on the side of the block it says 4601f but its upside down on the intake it says 4f12 and c5ae9425c also it says DIF also by the oil filter it says E0A6 of F0A6 can you please help me
Post Fiend
Joined: Apr 2008
Posts: 8,261
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From: Big Sky Country
You've already asked this once in the 73-79 forum, the answer's still the same, those numbers are completely meaningless for distinguishing a 360 from a 390, you need to pull a plug and measure the stroke...
3.50"=360
3.78"=390
3.50"=360
3.78"=390
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