make all the clips bigger/smaller for the leads (which ever aplies) and re-fit the buggers. also check that the fireing order is sweet.
bypass the (whats it called) resistor if you want a better spark.
just check everything, vaccum hose, leads, coil, engine earth cable (just listing all the shit my 4k had problems with) if you took of any manifolds or anything make sure you replaced the gaskets however good they might look!
check the timing with a timing light... spark plug gaps?