I used those heavy slugs for years....then one day, the heavy slug and crank became disconnected from the crank via the stock rod....no more stock rods..
The last 360 engine I assembled.(71 Duster)..I used Ross pistons that weight 484 grams plus the Scat I beam rods at 585 grams...I bitched at my youngest daughter about hitting the rev limited in the water box...6000 rpm chip...
One day, at TNT I drove the car....and guess what I was hitting the chip also...plus i could not believe how fast the rpm came up...each cylinder is about 150 grams lighter then the one in 71 my Demon...and I can tell the difference in the engine acceleration.
H beam rods and old trw pistons should be able to with stand a first strike from a nuke and continue to live...LOL...For a every day driver go for it...