Source a Small Journal SBC 350" Crankshaft

Larry Fulton · 10-15-2010, 10:38 AM

Quote:

Originally Posted by Tom keedle

there's NO OEM small journal 350 cranks.
i'd think aftermarket only..

I believe your quote is incorrect...

The first 295HP / 350" in '67 were o.e.m. assembled Small Journal Cranks...
It wasn't until jan / feb '68 production that GM went to the Large Journal 350"...
Dwight, is my memory correct?

(I'm done with the 283" stuff / just sold the 721 blocks, cranks, etc that I had been sitting on forever)

Thanks again! Larry

Mike Pearson · 10-15-2010, 11:34 AM

Quote:

Originally Posted by Larry Fulton

I believe your quote is incorrect...

The first 295HP / 350" in '67 were o.e.m. assembled Small Journal Cranks...
It wasn't until jan / feb '68 production that GM went to the Large Journal 350"...
Dwight, is my memory correct?

(I'm done with the 283" stuff / just sold the 721 blocks, cranks, etc that I had been sitting on forever)

Thanks again! Larry

If you could find one it would be extremely rare. I have never seen a small journal 350 crank. You would be much better off using a 4 bolt main block. Unless you have one of the very early 327 blocks they are not reliable. I ran them for several years in my car and had lots of split cylinders. Switched to large journal cranks and 4 bolt blocks no more problems. Better yet get a bowtie block.

Larry Fulton · 10-15-2010, 12:25 PM

Quote:

Originally Posted by Mike Pearson

If you could find one it would be extremely rare. I have never seen a small journal 350 crank. You would be much better off using a 4 bolt main block. Unless you have one of the very early 327 blocks they are not reliable. I ran them for several years in my car and had lots of split cylinders. Switched to large journal cranks and 4 bolt blocks no more problems. Better yet get a bowtie block.

Good advice!

Dwight Southerland · 10-15-2010, 01:07 PM

The '67 350 was the first designed large journal engine. The block design, etc. was updated to accomodate the bigger stroke and crank. I have never known of a factory small journal crankshaft even being designed.

NORVELL BOWERS · 10-21-2010, 11:25 PM

I have a 67 model 350, it is a large journal,

10-15-2010, 01:07 PM	#4
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,001 Likes: 64 Liked 780 Times in 194 Posts	Re: Source a Small Journal SBC 350" Crankshaft The '67 350 was the first designed large journal engine. The block design, etc. was updated to accomodate the bigger stroke and crank. I have never known of a factory small journal crankshaft even being designed.

10-21-2010, 11:25 PM	#5
NORVELL BOWERS Junior Member Join Date: Oct 2009 Location: Sulphur Springs Posts: 76 Likes: 0 Liked 1 Time in 1 Post	Re: Source a Small Journal SBC 350" Crankshaft I have a 67 model 350, it is a large journal,