340 build

You might want to rethink that..LOL....If you adding weight externally....you have remove weight internally not add weight ....

Now went internally balance an externally balanced crank..you are adding weight to the crank from the external balancer and converter to the crank...

Too many cooks in the kitchen....receipt for a big FU....LOL
Well better rethink that Chef.When i had it done it needed heavy metal.Plus the speedpro pistons need looser piston to wall .004 would be my minimum .Their forged expand more.Im not trying to tell the op what to do, just agreeing with other posters.Also I dont think it needs .065 file fit rings. BY BY.