Ly rods and 6 ok rods

[charger chris]

What is the good and bad  about these rods?

[c00nhunterjoe]

Ly rods were the desired sets back in the day, but with the cost of resizing and shot peening, you may as well buy a new set.

[Challenger340]

What is the good and bad  about these rods?

Some Engineer back in the day, had a problem at one time with the Beam section widths on the LY Rods, and figured they needed to be Bigger/Stronger. So they made BIG Beams similar to the HEMI Rods, and violla the 440 "six-pack" Rods were born.
only problem was....
they made them Bigger/Stronger alright, but also much HEAVIER ? And forgot while doing so, that NO Rod is stronger than it's Fastener or Rod Bolt, which they kept the same-same Rod Bolt as the lighter LY Rod ?

Long story short, that's the weak link in the 6-pack Rod being the Rod Bolt, which is further stressed by the Heavier 6-Pack Rod itself vrs the much lighter LY Rods.
and,
with most of today's aftermarket Forged Pistons for the 440's coming in around 900g with Pins, a full almost 1/2 Lb stress OFF the Rods compared with the stock 440 Pistons(1125g), the 'LY" Rods are just fine for most applications resized W/ARP Bolts.

But so much for the trivia.....
as mentioned, by the time you Buy ARP Bolts, and have the LY Rods resized properly, let be they are already 40-50 years old of unknown history ? There is a case to consider just buying aftermarket new Rods ?

[bakerhillpins]

Interesting tidbit. Thanks for posting Challenger340 

[flyinlow]

40 years ago I used resized "six pack" rods , Mr. Gasket SPS rod bolts and TRW forged piston where "the" set up.  Must have had good rod bearing , because those parts where heavy and the bearings held up.

10 years ago I used resized low mileage LY rods, ARP bolts and light weight SRP forged pistons. No problems so far. (48K. miles)

Today I would probably just buy new stuff. Stronger, better bolts and you know the history.

[charger chris]

Thank you guys. I got both set of rods for really cheap so I figger I can't go wrong. I could always put them up for later uses.