Buy a set of .137" longer eagle rods and a set of pistons with the wrist pin moved up .137". This will raise the r/s ratio to 1.58:1 same as a gsr. The sleeve strength on a given block seems to be random but this helps a bit. A light and balanced piston won't hurt either. Wiseco makes the pistons with the pin moved up .137", several companies like Endyn or IB sell their versions of these.