AAR project

[marksmopars]

Interesting note on engine parts, this engine was prepped before and it appears that the crank and rods were shot peened and balanced. It includes 5 rods with stock 340 rod numbers and 3 rods with 318 stock numbers. Physically the rods look identical except for the number? They were balanced as a set including hand engraved numbers on the rods.
I’m hoping someone out there might know more about this as it’s my nature to want to know.

 

[Xcudame]

The factory 340 rods from 68-72 where 2899496 and the pin was bushed by the factory. In 71, the 360 used 3418645 rods that did not have pin bushings. The 318 used the 340 "496" rods, but didn't have pin bushings. In 73 the 318, 340 and 360 used the "645" rods. From what I can tell, there is no significant difference from the "496" rods and "645" rods other than the factory pin bushings in the 340 engines. The "645" rods have enough material to easily and safely install pin bushings.

 

[Challenger RTA]

As Xcudame posted. I knew the answers. But I had to look it up to be sure. Just busy. As far as the rods. If you old use rods They can be magnifluxed and reconditioned. I think that is the course of action to take. Thanks Xcudame!

 

[marksmopars]

The factory 340 rods from 68-72 where 2899496 and the pin was bushed by the factory. In 71, the 360 used 3418645 rods that did not have pin bushings. The 318 used the 340 "496" rods, but didn't have pin bushings. In 73 the 318, 340 and 360 used the "645" rods. From what I can tell, there is no significant difference from the "496" rods and "645" rods other than the factory pin bushings in the 340 engines. The "645" rods have enough material to easily and safely install pin bushings.

I should be specific that this engine has 5 rods numbered 2899496 and 3 numbered 3418645, should have said this earlier, fyi.

 

[Xcudame]

I figured that is what you meant because those are the two that look so much a like. The earlier 318 (and 273) connecting rods are slimmer and there would be no way to balance them the same as a 340 rod.

 

[fasjac]

Nice! Right original color too