Brand New. Cola 4340 3.80" Forged Crankshaft for 86-99 1pc rear main seal SBC. pn COLS38003C280301. US founded and machined crank, not Chinese junk like Eagle and SCAT. Same crank as GM 12489436 used in HT383 and ZZ383. This crank costs 1126.00 new @ GM dealer. $700 shipped. FIRM. Add 3% for paypal.

 

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Im not trying to be mean in any way but i doubt you'll get 700 for this even if its new. you can find new forged cranks all day for 400-500. Sorry

 

Really, then quit trolling peoples ads or posts if you don't intend to buy it or contribute something useful to the post. I don't know which is worse, that or insulting absurdly low lowball offers.
BTW, It sold today with the rods and main caps. Most people are smart enough to buy quality parts instead of gambling on a 400-500 china special crank. Alot of us would rather use a high quality part on something as important and costly as a high performance build than imported junk peddled on ebay or wherever on the web. Consider that next time before you hijack someones post and potentially screw them out of a sale.

 

Like me i purchase a eagle 383 nodular crankshaft and it broke in 2 piece only 2 year after the engine assembly

The original engine was 4 bolt GM 350/300 crate motor purchase in 1995.

I got a question for you drain89 can i use the GM Crankshaft (P/N 12489436 3.80 stroke) In my application.
(One piece GM crate motor block, 5.7 GM forged connecting rod, single patern 509/509 hydr flat tappet camshaft,
AFR head 195cc, edelbrock RPM Air GAP intake manifold & Holey 750Cfm double pumper).

Ho by the way the block was 0 deck and the Eagle crankshaft was 3.75 stroke one rear seal internaly balance.



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Yes it'll work if you use the right piston. Remember GM uses this COLA crank in the HT383/ZZ383 motors....with a 6" rod IIRC.

 

If you dont zero deck the block, the 3.8 inch crank can be used with standard 1.125" 383 stroker pistons with 6 inch rods. Standard deck is 9.025 and 3.80 inch stroke with a common stroker rod/piston setup wil make standard deck block a zero deck block now

If its zero decked to 9 inch, then you will need special pistons with a 1.100 compression height

congrats on the sale man

 

Thanks man! I'm getting ready to unleash the next round of parts for sale!
I'm getting rid of my gen IV L92 stuff also.

 

sold