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Old 12-26-2009, 11:03 PM
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Stock Forged crank in sbc 350?

I was at my machinist the other day hanging out and having some lunch and he told me during the week he rebuilt a roller vortec 350 block out of 3/4 work van that had a forged crank in it. He didn't run any numbers on the crank but he said that there were no casting marks on and of the counter weights were usually on a cast crank you can see the casting marks. Did GM ever produce stock blocks with forged cranks in them? Thanks

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Old 12-26-2009, 11:35 PM
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zildjian, I've read that some 350's came from the factory with forged cranks, but I don't know what's supposed to be in the newer engines.
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Old 12-27-2009, 11:53 AM
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are they the gen I motors? Anyone got a casting number or was there a specific block or vehicle they came in? Thanks
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Old 12-27-2009, 11:56 AM
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Gen I heavy duty trucks and busses came with forged cranks
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Old 12-27-2009, 12:08 PM
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any specific years?
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Old 12-27-2009, 12:17 PM
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1969 - 1986 I believe
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Old 12-31-2009, 11:02 AM
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I bought a book a while back titled Chevrolet Small-Block V-8 ID Guide by Pierre Lafontaine. In it there are two forged 350ci cranks. Both are large journal.
1969-1985 cast number is 39411182 2pc rear main
1986-on cast number is 14088532 1pc rear main

Hope this helps anyone else looking for these.
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Old 12-31-2009, 12:31 PM
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When I worked at the local Chevy dealer we would look for engine jobs in any truck over 3/4 ton for forged cranks. Most were warranty and if a new engine was required we usually go to pick what we wanted after the factory guy cleared it. It was some time later the factory guy started breaking the parts after he OK'd it.

Vince
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Old 12-31-2009, 09:37 PM
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Vortec 350 steel cranks are quite rare. Only produced in nineties HD trucks & vans.

These are one piece rear main seal cranks. Balanced differently than earlier steel cranks. Crank throws are also different appearance.

I have seen only two over the years.
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Old 12-31-2009, 09:58 PM
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Early forged steel cranks are still around all over the place. When I'm driving around I see old Chevy dump trucks or 1 ton Chevy trucks abandoned in peoples yards and I just wonder if the engine in them has a steel crank.

Vince
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Old 01-01-2010, 12:29 PM
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Quote:
Originally Posted by 302 Z28
Early forged steel cranks are still around all over the place. When I'm driving around I see old Chevy dump trucks or 1 ton Chevy trucks abandoned in peoples yards and I just wonder if the engine in them has a steel crank.

Vince
ill tell you that you will be seeing me climbing under those pretty soon trying to pull the cranks out
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Old 01-01-2010, 03:15 PM
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Sorry, edited last post. Going to post parts in classified. Newbie mistake.
Cory

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Old 03-03-2011, 02:29 PM
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i have an 82 305 cid engine does anyone know if that has a forged crank cause i think it has the same stroke as the 350
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Old 03-03-2011, 03:41 PM
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Quote:
Originally Posted by c10chevy
i have an 82 305 cid engine does anyone know if that has a forged crank cause i think it has the same stroke as the 350
No 305 was ever made with a forged crank.
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Old 03-03-2011, 05:29 PM
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Did the 350's come with forged 2 bolt or only 4 bolt
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