It shouldnt hurt any. Take a look at the stock upper motor mounts they allow the engine+tranny to move forward quite a bit. Just rev your engine and look for yourself.
then there is two other mounts that hold the transmission and the other holds the engine. The main thing here is to make sure when you are pulling the engine forward is to make sure any wires or other connections are not being stressed so they dont break.
. Other then that you should be just fine
By the way for the n/a guys with the 9:4:1 compression i was getting around 185 to 190 psi. when cranking the engine for 3 seconds. Make sure you disable the fuel injectors and spark when your doing this also.
