honestly 20psi isnt anything amazing if u take ur time and do stuff right...im about a quarter of the way of having my block ready to go and i plan on running roughly 30-40 lbs on track days....its a matter of reinforcing the block i.e sleeves, low comp pistons, rods, good idea to have the rotating assembly balanced...and then obviously whatever u want to do to the valve train..but the basics for the block arent that difficult...its all a matter of how serious are u about making good numbers