+1 on the add an inline strainer.
First year with my Supra it overheated (slightly) since the oil cooler got almost full of seaweed. This also fried my impeller and I ended up exchanging the water pump.

I added an inline strainer which so far has never got too full within one season even though I check it occasionally.

Funny thing is the later model supras, from 2005 I believe, utilize an inline strainer. Only they put it on the fat sacs not the engine. Got to get your priorities straight! =)