Eagle Crank, should I buy it?

[MidnightSwinger]

I’ve got an opportunity to pick up “Eagle stroker 4340 crank part# 440039006760 chry 400 3.750 stroke use 6.760 rods (not included)$400 NIB” quoted from the ad.

I can’t find any info on that part number, the seller said Eagle quit making it over 14 years ago. He says he believes it is forged.

I wasn’t in the market for a stroker crank, but it seems like an amazing deal. I did some research on FABO and it appears that the eagle cast cranks are crap and the forged are decent? Should I scoop this up for a future upgrade to the 383?

 

[Max1196]

Can you zoom in on that front counterweight. It looks like there's been some dicking around with a weld on it.

 

[MidnightSwinger]

Can you zoom in on that front counterweight. It looks like there's been some dicking around with a weld on it.

Here is my best attempt, the pic quality isn’t the best. I’ve included the ad below if you want to see if you can get a better look.
Mopar parts - auto parts - by owner - vehicle automotive sale

 

[Max1196]

Holy hell. Ah, that would be a NO.

 

[MidnightSwinger]

Holy hell. Ah, that would be a NO.

Good catch, I didn’t even notice that.

 

[Oldmanmopar]

Check on piston availability. I believe you'll need to have them custom made by Ross or Diamond. $,$$$

 

[pishta]

That looks forged to me as the bearing fillets are not undercut like the cast ones. For the 1/2 price it may be a deal if you got the supporting hardware.

Chrysler 400 Eagle 4340 Steel Crankshaft - 3.900 Stroke, 6 bolt [440039006760] - $749.00 : AD Performance, Your Source for Longblock Performance Parts

AD Performance Chrysler 400 Eagle 4340 Steel Crankshaft - 3.900 Stroke, 6 bolt [440039006760] - Chrysler 400-361-383 Eagle 4340 Steel Crankshaft - 3.900" Stroke, Internal Balance, 6 bolt flangePN: 4400390067603.900 stroke, 6.760" rods, Internal Balance setup for 2550g bobweight, stock main and...

www.adperformance.com

 

[rumblefish360]

Or go to 440source.com and get just the pistons or get the whole deal for 2K or 2K-ish depending on what extras you’re adding.

 

[fishmens67]

You'd be better off buying a balanced kit. You save a few bucks buying the kit.

 

[Fast01]

Looks like Mallory metal was added to get it to internal balance. When it's pressed into the counterweight like that it's generally welded in, but that looks terrible. Between that and the fact you have no idea what bob weight it was balanced to.... I'd say pass.

 

[RustyRatRod]

I'd leave dat chit right where it is.

 

[Professor Fate]

Should you buy it?
No.
1.) It's been dinked with. May end up costing you more to get it sorted out than the price of a new one.
2.)

I wasn’t in the market for a stroker crank

Spend your money on what you DO need right now.

 

[RustyRatRod]

Spend your money on what you DO need right now.

I'm knockin on 60's door and that's still a difficult thing. LOL

 

[MidnightSwinger]

I'm knockin on 60's door and that's still a difficult thing. LOL

On paper it’s almost half off of full price, my mind was racing with possibilities! When it’s too good to be true though!

 

[MidnightSwinger]

Should you buy it?
No.
1.) It's been dinked with. May end up costing you more to get it sorted out than the price of a new one.
2.)

Spend your money on what you DO need right now.

It seemed like a can’t pass up type deal, I’m glad I asked!

 

[GTX JOHN]

You can take a production forged 440 crank and turn the
mains down to 400 size for less and have a much better crankshaft.

Very popular years ago and pistons are available. 471 CID.

 

[74 360 dart sport]

4340 is a forged crank

 

[MOPARMAGA]

Looks like it was balanced, it's a good price but I'd ask questions because someone did something

 

[GTX JOHN]

By the part number it looks like a 3.9 stroke crank
for a 440 Main size = Not a 400 for 3.75?

 

[MidnightSwinger]

By the part number it looks like a 3.9 stroke crank
for a 440 Main size = Not a 400 for 3.75?

That’s what I told him, it’s a discontinued crank apparently. I’m not sure if he is the original purchaser, doesn’t seem to know much about it. I’m just going to pass on it.