i have some d-series motors laying around-d15a3,d15b2,d15b6,d16a1,d16z6,d16y8,d16y5 and i want to put a motor 2gether from these 2 boost.what would be the best rod piston combo that will give me the lowest compression??.im using the z6 block and crank and the y8 head and puting new rod bearings in...what would you use?