harmonic balancer 400

[greatwn73]

   Recently aquired a 73 400 Magnum but missing the harmonic balancer. How do you tell if the original was externally or internally balanced ??

[firefighter3931]

All stock 400's were cast crank....if the engine is original it will be externally balanced and use the thick dampner. 



Ron

[greatwn73]

thanks, time for a trip to my favorite scrap yard

[Nacho-RT74]

All stock 400's were cast crank....if the engine is original it will be externally balanced and use the thick dampner. 



Ron

I think 4 speeds were forged

[John_Kunkel]

All stock 400's were cast crank....

Some car 4-speeds and truck standard shift cranks were forged.