I stopped by the balancing shop today and talked to the guy. I had found earlier the C4AE 6303 G cranks out of the High Riser had a 2,303.5 gr. bobweight, my crank is the C4AE 6303 G but has 2 extra counterweights off the center main, the balancing guy says the extra 2 weights won't effect the bobweights very much if any since their on the center main.
My dilemma is, if I go too light on the rods and pistons, he'll have to swiss cheese the crank weights to balance the assembly and if I go too heavy he'll have to add Mallory Metal. I took him one of the SK rods and a stock 390 C7AE-B rod, the 390 rod is too light, and the SK is too heavy.
So referencing the rotating weight of 650 gr of the SK rod and a guesstimate weight of 800 gr for a TRW piston & pin those would add 300 gr to the bobweight requiring Mallory metal. Options are finding a piston & pin weighing 500 gr to lose the 300 gr or find a rod & piston combo to loose the 300 or so weight.
So the trick is finding what I need off the shelf other wise I will have to go custom ($$$$).
A C4AE-6303-G is a forged steel crank, induction hardened SAE 1046 material.