hold on u r going to be boosting a motor with over 245xxx...
i wouldnt i would just leave it alone untill i get one rebuilt.
but i am not you lol
all its going to do is blow rods out the side of the block..
before you go in boost it do a compression test to it and see where the compression sits at.. im not doubting you all the way it is just boost puts alot of strain on the motor and it being an ass load of miles dont help at all... and on other hand if it is ur DD to get you to work and back dont blow it up..