I would basically echo Chips reply to be honest Will..

That cam combination is going to destroy driveability anyway, compression wont help it at all really.

I would also personally drop the 8 injectors, runners, 8inj loom and the P8, sell it for the huge amount of cash they draw, and fit 4 big injectors and a level 8, get it live mapped on closed loop and still have a LOT of change from your sale.