First thing I will say is if you haven't rode one of Zach's engines, you don't know what your missing.
I'll start with the smaller one.
PHP753
-Specs: 62t/62t, pump gas, charging system w/MSD, PFP ran wet, OEM 44's on PHP intake, Vforce 3 reeds, ADA head, #zero flywheel.
I'm running this...