^^^ Good point about the block.
When I kicked a couple rods out of my drag-race 340 many years ago, and took a good analytical look at the pan rails & webs, the 1st thing I bought was an R block.
Yeah, I know there's a lot of guys making big power with the spindly stock blocks, but this little 368" engine's still running low 10s with no issues @ 620-640 HP.
Eagle forged crank & H-beams, JE pistons.