block casting #'s

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07-18-2011 | 11:44 AM

#11

DMOORE

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Joined: Jul 2007

Posts: 988

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From: San Diego

Quote:

Originally Posted by westdanny

I hav the same engine and it is stamped as a HI PER PASS whch means it is a high performance passenger. I can not find out what this engine is. Thanks, for any help, Dan

WE just sold a block with the same stamping. It was a 2 bolt 454.

Darrell.

07-18-2011 | 06:17 PM

#12

jeffswav

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Joined: Oct 2005

Posts: 1,899

Likes: 20

From: Millstadt, IL

Quote:

Originally Posted by DMOORE

WE just sold a block with the same stamping. It was a 2 bolt 454.

Darrell.

I just posted the data from mortec, some were 2 and some were 4. Why they did that is beyond me.......

07-18-2011 | 08:23 PM

#13

DMOORE

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Joined: Jul 2007

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From: San Diego

Quote:

Originally Posted by jeffswav

I just posted the data from mortec, some were 2 and some were 4. Why they did that is beyond me.......

I never understood that one either. The first time I pulled a pan off one marked High per pass, and seen a 2 bolt, I was dumbfounded. One would think High performance would at least include a 4 bolt.

Darrell.

07-18-2011 | 08:26 PM

#14

DMOORE

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Joined: Jul 2007

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From: San Diego

BTW... what would it cost to have a set of splayed steel caps installed on a 2 bolt block.
I do believe that the high per pass blocks do at least have the high nickle content.

08-26-2025 | 05:52 PM

#15

BillK

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Joined: Oct 2005

Posts: 1,074

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From: Waldorf, Md

Quote:

Originally Posted by jeffswav

I just posted the data from mortec, some were 2 and some were 4. Why they did that is beyond me.......

The blocks are all basically the same so they have the same casting number. They just machined some for 2 bolt and some for 4 bolt. No different than all of the GM Small Blocks for 50 years.