Mopar 440 racers - time to legalize that shortblock!

[RocketBlock]

Originally Posted by SSDiv6

In Stock class, as long as you run the same OEM material and stroke as the engine you claim, using a crank in the same family is acceptable. As an example, using a cast crank within the different years of a Chevy small block, as long the stroke is identical, it is okay. However, using a forged crank in an engine that had a cast crank is not acceptable.

Incorrect. 440 crank is in the RB family, 413-426W-440 engine size, 2.750" journal size as. RB family as defined by Chrysler.
400 block is in the B family. 361-383-400 engine size as allowable in NHRA competition (other variants predate NHRA allowance for competition). B family as defined by Chrysler.

You can swap a cast crank for a forged crank application as long as the part is OEM and part of the same family. Example. You can use a 396 cast crank from a 265 horsepower Impala in your 375 horsepower Camaro engine for a weight savings. You could also use the standard small bolt rods. These are direct fit, same family applications. Truck crank, boat crank, it would not matter.

Again, "no crossbreeding of parts allowed". Also, "lightening of crankshaft other than normal balance job prohibited" Note: Per NHRA in SS you can turn down main and rod journals as much as you like.


Yes, any intake you can come up with allowable in SS as long as same configuration.