hi trinity blood..
sori to interrupt ur thread
but i believe to give a betta explanation bout the 68 crankshaft
it's only plug n play to those using evo's block, even using back or own evo's conrod..meaning that u can fit in directly except for selection of pistons which the best i guess are from nissan series (sr20,vg30-that means engineering works will involved-pressin+skimmin)..
as to those using the vr4's family blok..more engineering work will have to be done
the 68 crankshaft need to be 'open-up' its kangkang to be fit in the 67 or vr4's block and even have to skim the vr4's conrod to be fit with the crankshaft+pistons selection of nissan series (engineering works comprises of pressing and skimmin)
the diesel conrods usually involved with 64 crankshaft mainly..
hope this will help to those out there
TQ and sori once again