That engine looks familiar
That is my 400 500" stroker that the machine shop overbalanced adding weight the the front crank throw. discolaration on crank throw from where they welded the weight in.
After running engine like that for a few races, I pulled it back apart and had the crank re-balanced where they removed the weight the other shop added.
After that episode, I bought a good scale and rod balance fixture to verify the balance on the other 440 source stroker kits which were OK.
The BCR caps and girdle are nice. The machining cost to install them is not cheap. Align bore/hone the crank bore, and mill the block/caps level was almost the cost of the cap/girdle kit.
I also had to make a custom 1/2" oil pickup, but it ended up basically just a straight tube welded to an old milodon pickup cup/screen, Using the milodon low profile 7-quart oil pan from my old 451 stroker engine.