To the 390's
.090 over bore?
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Elder User
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From: Okla.
Where is the crank# at? I looked and can't find a cast #, witch counter weight is it on? The main and rod bearings are std. Timing chain is steached bad. Thanks for the help.
Last edited by 74 F100 351m; Aug 12, 2006 at 11:01 PM.
Needsmorecoffee.
Joined: Oct 2004
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From: CT
Crank number is on the edge of the 7th counterweight. Could be a 2U, 3U or a full casting number. I bet those slugs are .060. if they are 4.14 428 slugs they'd be marked .010 possibly???
G.
G.
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Needsmorecoffee.
Joined: Oct 2004
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From: CT
It should be on the side of one of them unless it was ground off for some reason. Look on the inside edge also. It should be there somewhere. My 428 crank has IUB stamped on the inside edge of #7. My old 2U 390 was stamped there also. I think your slugs are .060 giving you a 4.11 bore.
G.
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From: Okla.
D3TE is on the block. 4 1/16 with a tape. I was told it was a 390, by the guy I bought it from.I fond 2T on the 3rd conterweight.
Last edited by 74 F100 351m; Aug 13, 2006 at 10:26 AM.
Cargo Master
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From: Central Texas
Originally Posted by 74 F100 351m
I was told it was a 390, by the guy I bought it from.I fond 2T on the 3rd conterweight.
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