400-451 help

[71abodys]

Hey guys I know this topic has been beaten to death but I finally have all the parts I need to build my 451.. The issue I have is who do I use to handle the machine work to the 440 crank to fit the b block journals. is this something you would bring the block and crank to machine shop so everything is together, or is it safe to send the crank to a recommended machine shop that knows exactly what to do with the journals and counterweights. Any help is much appreciated. I am in central NJ. I don't have the knowledge of any reputable machine shop around me that deals with mopars. I am stuck in chevy land. Thank you everyone!

 

[EchoSixMike]

Any engine shop with a crank grinder and a competent operator can handle that. Any shop with a large enough lathe can handle turning down the counterweights.

Honestly, based on the jackassery I'm dealing with now with my 452, I'd open up the main journals to 2.750 (440) size just so you have bearing choices. There's only two full grooves bearings for the 383/400 journal, a Clevite plain and a Sealed Power plain. For the 440, you have Clevite P and H, probably V's too, plus King's, Sealed Power and probably some others. S/F....Ken M

 

[IQ52]

I sent the crank to the machine shop, had them cut the counter weights .120" in radius then machine the main journals to 400 size. Later you will need to set the crankshaft in the block and carefully turn it to see where the block will need to be ground slightly. That's how I did the first one anyway, turned out to be okay for 780+ horsepower.