I had a 360 that I sprayed with a 180 shot for about 8 years with stock crank and stock rods...BUT, I had very light JE pistons and ARP rod bolts on those rods. I think if you are asking the question "what can these rods take", then it is time to upgrade. When I built my stroker I didn't want to find out if the stock rods could take the abuse of a longer stroke, so I went with Scat I-beams which are 4340 steel (and of course, a very light piston).