just looked at the pics jesse
looks like youve done a really nice job
lots of attention to detail
needs a fabricated rocker cover lol!
may need bigger breathers

spare jesse?

or stick your finger in the #1 plug hole
turn engine till it choofs your finger off then you have the correct TDC (end of induction,beginning of power stroke)
then turn by hand till TDC mark, (if its correct, outer ring of balancer can move on some engines, luckily not a series)

fyi gtr injectors are R33

coz youve got twice the vacuum across it
engine sucks on it harder

ayrton senna died due to welded steering components failing
so if the F1 guys cant get it right youve got zero chance
design the weld out of the part

piston to bore and piston to valve are not the same thing

check the paperwork that came with the pistons then speak to your machinist
if he doesnt know, find another machinist

****just reread catalog, i misquoted dish cc's. its actually dish depth. sorry****

GA16DE looks good on paper
76 bore 19mm floating pin 29.5 comp height 4.6mm dish
modern design thin low drag ring pack

or daihatsu HD
76 bore 19mm pin 30.2 comp height .5mm dome

need to look at them and see the oil return slot design and choice would depend what comp you need

really good catalogs here http://www.teikin.com/

caltracs will cure any tramp
you have drawings there jesse