270 rwhp is around 350 bhp. It's really fast for this hp. A proper fuel system is a must. I believe the stock m90 pulley which is about 7 psi is pretty safe for the engine. You might need to have a complete exhaust system from the heads down to the mufflers to maximize the potential of the m90. Lextreme has the rebuilt and strenghtened torque converter that will ease your tranny. Here it is: http://www.lextreme.com/allgo.html. Also, a tranny cooler is a safety to abuse your tranny.
thanks stevechumo for your reply I will start off with the tc and source the other parts for the sc thereafter.