LS1 tweaking and durability

[dusterbd13]

ok, this may stir up a hornets nest, but here goes.
i have heard from a fellow racer that the rod bolts on a 97 LS1 are rather weak, and tend to shear when pushed too high in the rev range or subjected to too much horsepower. is this correct?
if so, what is that RPM range/ power level?
if not, heres what we want to do. were looking at a cam, heads, and intake/TB swap on a 97 vette. mostly a DE/TT car, so it will get severly abused. currently equipped with minor bolt ons (black wing, coated long tubes,x-pipe, high flow cats, corsa exhaust, reflashed PCM, lower temp thermostat, smooth bellows, underdrive pullies. last making 350 at the rear wheels. we want to get into the 425-450 range on a stock short block, with good drivability and excellent longevity. i was thinking a 90MM FAST TB, FAST intake manifold, and the trick flow cam and head package i saw in summit. there are probably better parts out there, but i havent really started doing research due to the rod bolt question.
so, the long and the short:
are the rod bolts going to be an issue?
and what cam and heads to go along with the bolt ons would you recomend?

tahnks
Michael