The weak point is the rod BOLTS not the rods. What rod bolts do you have? If they are LS rod bolts then do not take it past 7800 and even that depends on how well your setupu was put together. Building an LS-V w/out upgraded rod botls is a waste of time b/c you still can rev it out like it needs. But it still should be a bit quicker than the LS.