Definately remove heads again and replace the gaskets. If tis leaking now, it will always leak.
The gaskets are impregnated with an adhesive which is designed to seal the gaskets to the head and block surfaces after heat-cycling. If its leaking coolant, this means coolant is getting between the gasket and head / block, meaning your gaskets will never seal. Not oiling / cleaning your head bolts will mean your torque settings will be lower than accepted and the seal you are creating will be not very good, I suspect causing leaking you are seeing now. If you leave it it may be alright for a while, but soon it will run rough, be un-tunable as far as carbs go, and be down on compression / power.
As Brit01 said, its relatively low cost for 2X new gaskets.