Crank

[68dart-sb]

Forged Steel Crank from 1967 - 273, should work in all 273 and 318's and may work in 340's

location - Middletown, Maryland zip 21769

price - $90 + shipping

certified check, money order or postal money order

 

[Zippie#7]

Just to help: 1964-69 273 crank Stroke 3.310" con. Rod Journal 2.1240-2.1250 Main Brg. Journal 2.4995-2.5005
1968-71 340 crank Stroke 3.310" con. Rod Journal 2.1240-2.1250 Main Brg. Journal 2.4995-2.5005

So, yes, this 273 crank will fit in a 340. Found this info in an old GLENN's TUNE-UP AND REPAIR GUIDE I PICKED UP AT A TAG SALE.

 

[Locomotion]

One difference between early 273 cranks and 340 cranks is that the early 273's had a smaller register for the converter snout, so a later model converter won't fit. I found out the hard way a long time ago. It can be machined out. But you would still have to rebalance the crank to the rest of the assembly either way.

I don't recall what year they went with the bigger register and I can't tell by the pics. But it would be a good idea to measure it and post the numbers. Someone else may know the specifics.

 

[pishta]

I believe it was 67 and the 340 cranks are drilled through the rod throws to help offset the heavier rods they used and keep the same counterweights. They can be drilled by crank shop if not already. I bought a forged crank for a "340" from PAW a long time ago. Casting numbers didnt jive so I called and they said they used a 318 Poly forged crank and drilled it to 340 specs. I only paid $149 so I didnt quible. I broke 2 flexplates on that motor because my 65 hub was too small for the register (I guess they drilled it for a 340 in both spots) early converter to later crank bushings are available now.

 

[68dart-sb]

Crank is gone - still have 273 .040 over pistons and block - any interest??