I-6 ?, 235 or 250 or 292 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**67sss** · 08-31-2003, 10:16 PM

Trying to figure out what I have. here are some of the #'s on the block.

CON2
L17S
3850817

plate with this on it: Bore 040
Rods 010
Mains 010

side covers are 4 1/2"

also looking for header(s) for this.

Thanks for the help

Fred T · 08-31-2003, 10:47 PM

I'm assuming this is in your 67 pickup. I went to www.inliners.org to their casting list. 3850817 shows as either a 230 or 250. Since it is in your 67, it should be a 250. The plate shows that the block has been bored over .040, crank ground under .010 on both the main and rod bearings.

try www.stoveboltengineco.com or www.cliffordperformance.com for headers and intakes. I would also get a copy of Leo Santucci's book "Chevrolet Inline Six Power Manual". You can buy it from the online bookstores or at inliners store.

Fred T · 09-01-2003, 12:57 AM

I pulled out Santucci's book. For your casting number he shows 66-70 230, 66-79 250 for passenger cars. He also shows 62-79 250 for trucks, but I have to disagree with him there because the 62 used the old 235, while the 63-66 truck used the 230. The 250 was introduced in trucks in the 67 model.

1969 GMC · 09-01-2003, 02:11 AM

Fred, was the 230 available in 67-72 trucks? I only ask because it is listed in my owner's manual as one of the available engines, yet I have never seen nor heard of one.

08-31-2003, 10:16 PM	#1
67sss Registered User Join Date: Nov 2002 Location: Mt. Vernon, WA.. Posts: 2,322	I-6 ?, 235 or 250 or 292 Trying to figure out what I have. here are some of the #'s on the block. CON2 L17S 3850817 plate with this on it: Bore 040 Rods 010 Mains 010 side covers are 4 1/2" also looking for header(s) for this. Thanks for the help

08-31-2003, 10:47 PM	#2
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	I'm assuming this is in your 67 pickup. I went to www.inliners.org to their casting list. 3850817 shows as either a 230 or 250. Since it is in your 67, it should be a 250. The plate shows that the block has been bored over .040, crank ground under .010 on both the main and rod bearings. try www.stoveboltengineco.com or www.cliffordperformance.com for headers and intakes. I would also get a copy of Leo Santucci's book "Chevrolet Inline Six Power Manual". You can buy it from the online bookstores or at inliners store. __________________ Fred There is no such thing as too much cam...just not enough engine.

09-01-2003, 12:57 AM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	I pulled out Santucci's book. For your casting number he shows 66-70 230, 66-79 250 for passenger cars. He also shows 62-79 250 for trucks, but I have to disagree with him there because the 62 used the old 235, while the 63-66 truck used the 230. The 250 was introduced in trucks in the 67 model. __________________ Fred There is no such thing as too much cam...just not enough engine.

09-01-2003, 02:11 AM	#4
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Fred, was the 230 available in 67-72 trucks? I only ask because it is listed in my owner's manual as one of the available engines, yet I have never seen nor heard of one. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650



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