Late to the party here, but these "balanced kits" are pretty notorious for being way out of wack when purchased and often end up at the machine shop to get rebalanced the right way.It's always the voice of reason that over rules the desire to spend stupid money.
An Eagle forged 408 recip assy that will fit into any garden variety stock block comes complete w/ everything pictured for 1929.00
Or, when talking naturally aspirated,...The cast crank/ forged piston/I beam rod version is 1259.00. (My favorite)
A N/A 408 will be stupid reliable, make every bit of 500/500 w/ the right heads and cam, be capable of on the edge of block integrity 750 HP.
Either way they're a balanced assy, so the balance comes off of the machine bill. The rods are included so the rebuild of the rods come off of the bill as well. New crank,..no need to turn the old one. The only machine bill remaining is the cleaning, the bore and hone, and decking.
With the bottom option, you'd have the whole short block sitting there done for 2k.
Regardless, one still comes out ahead this way, even if it's a few hundred more than advertised and you are making a milder N/A mill.