|
|
Post by bigblocksonly on May 30, 2020 18:47:03 GMT -5
I have a 1974 440 Mag. Unfortunately, I have to replace the crankshaft. The old crank has no complete casting number. It only has a "3" on #1 counterweight and a "DF3" on the last counterweight. Any help figuring this out would be greatly appreciated. I do know the conrods are from a 440 six pack (casting # 2951908)
|
|
|
|
Post by odzking on May 31, 2020 9:35:55 GMT -5
According to the parts manual, there are 2 cranks for the 440 in 74. One is forged one is cast. 3751891 & 3751899 respectively.
It says in a * note that a 440 could have either. Cast crank is identified with the letter "E" on the pad on upper right front of engine block.
Is that what you're asking?
|
|
|
|
Post by Nacho-RT74 on May 31, 2020 13:38:46 GMT -5
I can't recall any casting number on a forged crank, and casted 440 numbers on crank to identify it Anyway any 440 crank will fit. Juts match if cast or forged  Dunno on the rods |
|
|
|
Post by bigblocksonly on Jun 3, 2020 20:03:43 GMT -5
odzking….Sorry, no. The old crankshaft is the one that I am talking about. There is no formal casting number on the crankshaft anywhere. All it has are the numbers I stated in the first listing sir. Not being a smarta$$. I would really like to try to identify the old crank. It came with the original engine, but I was told by the owner that her father had "modified" the engine with a six pack lower end.
|
|
|
|
Post by charger440sixpac on Jun 8, 2020 10:34:52 GMT -5
The heavier 908 rods were used in a number of 440 applications, the six pack cars, motor homes and marine engines. The extra weight of the rods requires a specific/unique harmonic balancer. I don't recall any significant difference in the crank other than it being the more durable forged unit used in HP applications.
|
|
|
|
Post by Nacho-RT74 on Jun 8, 2020 18:06:06 GMT -5
just corrected the image link... it wasn't being loaded
|
|
