Originally Posted by J1mbo

Unfortunately now a 200 block is a gamble. They're old and getting weak at big torque levels.
For us to run a 200 block above certain levels now it's a risk the customer takes as you can't warrant a old yb block now.
We have seen so many issues with the yb block starting around 550bhp in racecarsdirect and were still trying to push 800+
When you work out the cost involved on a 20k plus engine build the extra 1k over a nikasil linered block for the safety aspect alone it's worth every penny
Not to mention the rod angle, capacity, weight gains etc it's a no brainer really