confused on what to do!

[riceburner700]

i have a d15b7 with some 310cc injectors and a t3. the car is running off a p05 ecu. I am building a d16y7 and am thinking about running a p06 for it or the p05 if it could handle it. now my question is that im saving for hondata s300 and want to tune my current car(d15b7) with the s300 so its reliable for at least 6 months. Then when the other motor goes in retune with the s300.

i guess my question is should i run a po5 on both motors or convert to a p06?

[HONDA GHANDI]

The only difference between the two is that the P05 does not have the circuitry to use a heated 02 sensor. Other than that they are the same.