389 Crankshaft casting #'s
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389 Crankshaft casting #'s
I think it is a forged steel unit. The front counterweight has U26 stamped into it. The 2nd to very back counterweight or throw has the following number- D2TE6303 and then what looks like either an E or possibly an 8. The very back one has what looks like N47. Anyone know these?
Post Fiend
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From: Iowa
My book doesn't list 389 cranks, but it does list the rest of the FT cranks. Only the FT forged cranks have the D2TE-whatever numbers. The closest I can see is a D2TE-EA, which is a 391 crank. It looks like you probably have an FT 389 crank.
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Well if the block would have been one with the thicker walls I was going to very slowly build it into a 413, 416, 422, 428 (whatever it would have taken to clean it up on the overbore .020, .030, .040 etc. I am just looking for a good block and thought that one with more meat wouldn't be a bad idea. I have plenty of time to find another one though. Really though I just want one of the new Genesis 427 blocks (but that probably won't happen for at least a few years so...) The 389 block I have is junk though
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What are some tell tale signs of the 389? Would there be an "FT" in the casting #'s ?
Jason
What are some tell tale signs of the 389? Would there be an "FT" in the casting #'s ?
Jason
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No FT but from what I know alot of the heavy duty blocks will have a upside down (mirror) cast 105 on the front driver's side of the block. Most blocks say 352 there. Some other signs are the casting number on the sides of the block. Later blocks will have this on the passenger side of the block towards the front. Earlier blocks have it on the drivers side. Not completely sure but D4TE1 and D3TE? (I think) are usually heavy duty truck blocks and I'm sure being's how Ford liked to just throw stuff together that some other casting numbered blocks could have the same features as I have seen a 391 FT that had C7ME on it which is the same casting number on my 390 block in my pickup, maybe mine is a heavy duty one, not sure though. Just because they are supposedly heavier duty doesn't mean that they will go .080 over though. Besides the drill bit test (to tell if they are even a good candidate for one) the only real way to know is by sonic checking. Hopefully someone else with some more knowledge will chime in though. Go look for heavy duty trucks is one place to start looking other than checking every block you come across. What are you planning to build?
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Just a note... The 389 block I have may have been rebuilt at one time and maybe that is why it doesn't have as much meat in the cylinder walls. I say this because I noticed that it has Clevite 77 main bearings in it I will have to mike the pistons to know for sure or check the bore with a guage.
Post Fiend
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From: Iowa
FWIW, a lot of those mirror 105 blocks were used in later 360's, in F100's and F250's. Those blocks are a good deal since they already have the FE distributor bushing, and usually aren't completely beat to death. You also get the timing cover, a decent set of heads, ...
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