but if it were me, I would pull the head and get a new set of pistons and rings off a trusted ebay vendor and rebuild the bottom end topping it off with a custom ground cam new rod and mains with thrust washers. and new oem toyota gasket kit, but thats me
oem gasket kit 75 - 125
piston set rings bearings 69-120
cam 125
less than 500. and if the crank was toast, there not hard to find any 20r 22r or 22re cranks all interchange