273 Connecting rods with TRW L2222N Pistons

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241redram

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I have this set of pistons and rods. Seven of the rods are 2406782 and one is 1618699. Can anyone tell me what the two different rods are original to - 273, 318, years? Any information is appreciated. Thanks

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The 699 casting is the later, larger 318, 340 and 360 size rod. You can see the size difference.
 
I have this set of pistons and rods. Seven of the rods are 2406782 and one is 1618699. Can anyone tell me what the two different rods are original to - 273, 318, years? Any information is appreciated. Thanks

View attachment 1716167576

View attachment 1716167577

View attachment 1716167581

View attachment 1716167582
The 699 casting is the later, larger 318, 340 and 360 size rod. You can see the size difference.
One is a part number and one is a casting number.
 
Look at the red lines I put in the picture. Look at the big end. Look how much more room the top rod has compared to the second one. That rod has a LOT more meat there. Look at the red lines going up both rods. Look how much wider that top rod is compared to the others. It's very obviously a different rod.
RODS.JPG
 
Look at the red lines I put in the picture. Look at the big end. Look how much more room the top rod has compared to the second one. That rod has a LOT more meat there. Look at the red lines going up both rods. Look how much wider that top rod is compared to the others. It's very obviously a different rod.
View attachment 1716167756
Different angle dummy! Same rod, one is a casting number and one is a part number. You are just looking at a photo of different angles.
 
Dude, it's a different rod. Look where the rod joins the small end on both rods. Can you not see the top rod is wider there? Disagree all you want, but you're wrong. The top rod is a wider rod.
 
Those rods are for 273's or early 318 rods. They are for full floating pins, they have a bronze bushing in the small end.
Late 318's [1971 and up] and 360's use the wider, stronger, heavier rods. They are for press fit pins.
All 340's use the heavier rods with bronze bushings.
 
No idea on rods lol, but those look like replacement commando pistons.
Probably TRW's (their number anyway. Egge uses the same number) I was never a fan of that centering hole on those but it must not have been an issue.
 
I believe that the old school TRW pistons used the centering hole. The pistons I've seen from Egge didn't have it, I could be wrong.
 
I believe that the old school TRW pistons used the centering hole. The pistons I've seen from Egge didn't have it, I could be wrong.
That got me thinking. I found my photo. There are there just a lot smaller.

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