here is the email i received from them...
We do have a 4.2 blower kit with custom forged blower pistons, steel crank
and H Beam rods. This kit costs $4,500. You can run this normally aspirated
but it will make less power because of the lower compression. The power gain
is up to 50kw. The stroker makes a huge amount of torque.
We also have fully ported heads available on an outright basis. These would
cost you $2,200 and this package includes new valve springs, moly retainers
and 3 angle valve job. The heads flow 100 horse power more than the standard
ones.
A new billet cam is $550. We have many custom grinds available for your
application.