From what I’ve read, the stock cast crank is suitable for builds up to 600hp. I only have a picture of it, tightly wrapped up in plastic with a 10/10 360 written on it... It’s from block 4006830-360-2 from late 1975 though.
I would think the 10/10 means you need .010 under rod and main bearings.
you can mic it then plasti guage it upon assembly. Both will indicate if there are any issues. I know it sounds like alot but after you do it once or twice its like riding a bike you never forget it. basically work in stages,get the short block together first then oil pan then heads and vlale train. each section goes in steps. then there is the front timing cover and balancer etc. dont try and do it all in one day LOL! but you could...
