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Original Message
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I think we should screw the "Z"s. |
By Dave Shoe - 11/20/2001 12:34:27 AM; IP 216.243.158.114 |
If the fourth digit of the part number is a "Z". you can forget about it. It's a service replacement "PART" number.
Even if it's not a "Z", the numbers you are likely looking at are "production" part numbers gleaned from a goddam book. Screw them, too.
The ONLY number I'd give a twinkie for is the "casting" number. (Actually, it's a forging number, but let's just call it a casting number for simplicity.) This is a raw "pre-part-number" marking which gets right to the heart of what the hotrodder is looking for.
Since "part" numbers are NEVER found on a rod, you need to learn to look for "casting" numbers, and to learn what are the good casting numbers.
It all boils down to some simple-ass rules: There are only three FE rods worth thinking about. You've got the skinny-ass rod found on FE displacements from 360CID on down. You've got the husky-ass rod found on most all 390+CID FEs since mid-1963, and you've got the heavy-ass rod found in racing 427s and all SCJ FEs since 1964-1/2.
Does that mean the 428CJ rod, with the oddly dimensined 13/32" nut-and-bolt is the same as the 3/8" bolted rod on Mom's 1965 390-2V Galaxie wagon? You bet your sweet ass it does. Except for the drill bit used to cut the bolt hole, these rods are IDENTICAL. Same steel, same forging tool, same thing completely. It just depends on the drill bit selected by the machinist.
But what about the year? Some rods are C5, others are C7. "Who gives a rip", is what I say. The design didn't change, only the paperwork. Wait a minute! - maybe I need the rod with the latest paperwork! Perhaps this is a concern best left to weenies, as this is a HOT-RODDERS forum, not a forum to discuss the merits of proper document control procedures.
Screw production part numbers. Screw service part numbers. Just give me casting numbers and a wrench.
Shoe. |
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