72 TA : New Project

**njsteve** · #1 01-17-2005, 05:26 AM

So I'm starting the cleanup getting ready for reassembly of my 455 HO and I see this hole in the main web. It's the original engine with 115,000 miles on it so I guess it really didn't hurt anything. After looking at it all day and sticking assorted picks in it to see how deep it was (over 3/4 inch deep) I used a bright light and saw threads inside. So I pulled the #3 4-bolt main cap and see light through the hole. I guess an overzealous machinist cut the hole too deep originally. Has anyone ever run into anything like this before????

**njsteve** · #2 01-17-2005, 05:27 AM

Here's the bolt view from the bottom:

Belair62 · #3 01-17-2005, 08:27 PM

Engine built on a Monday morning ??

**njsteve** · #4 01-21-2005, 08:01 PM

It was cast on J181, Sept 18, 1971. Anyone have a calendar cross reference???

**Mr70** · #5 01-21-2005, 08:25 PM

J 18 1-is October 18th 1971.
That was indeed a MONDAY.

**John Brown** · #6 01-21-2005, 11:01 PM

Lighter weight. She's a factory race part!!

**njsteve** · #7 01-22-2005, 04:33 AM

[ QUOTE ]
J 18 1-is October 18th 1971.
That was indeed a MONDAY.

[/ QUOTE ]

Actually I think "J" is September as "I" is not used in the casting date sequences because it looks too much like a "1", so it goes, A-B-C-D-E-F-G-H-J-K-L-M. How's the calender look now?

**Mr70** · #8 01-22-2005, 05:46 AM

If it's the letter "I",then it's a Saturday in 1971.
I know Tonawanda used the letter "I" in their engine casting dates.
Delco Remy did not use the letter "I" in their dating of electrical components,among others.
At least that is what I have found from back then.

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