Important if you run D-H/S or SA

[SSDiv6]

Originally Posted by David Lee

So wall thickness and deck thickness have nothing to do with a better seal. And if so many racers are going fast, with stock blocks, why the need for aftermarket blocks.

And you want to limit it to that one subject.

Like I said in the previous post, that is the reason why people fill their blocks.
Others sleeve them.
A properly filled or sleeved block, machined with the right equipment and by someone that knows what they are doing, will make power.