Removed heads and found this mess

i worked on an 87 lx 5.0 one time that was so sludged up you had to pour oil in it a little at a time or it would puke it back out. kerosene is really not good for bearing longevity in my opinion, i've had buddies do it before and had to put bearings in it later. just get the scaper out and collect as much as possible. also iff that crap goes into your pan it can clog up your pick up tube.
 
looks like chocolate...MMMMMM....1 of the 2 302's we had in auto school was sludged up real bad like that, my teacher said that the 5.0's are notorious for that, but yours is the only other one ive seen like that.
 
I would say anything that will brake it down and run it out the pan...

brake cleaner, engine degreaser, anything...

But first scrape and shop-vac what you can..

What did the rockers look like?

Chris
 
That is a leaf! I had the garage door open and this stupid tree in my yard is trying to wreck my engine. I bought the car last year from my brother and I haven't changed the oil as of yet, but I havent accumulated very many miles, maybe 2000. I would say in the last 5 years the car only has seen about 10,000 miles. The rockers look great, but there was some more sludge in the heads too. I am replacing the heads.

Just asked my brother how often he changed the oil.

"All the time. I always used the synthetic oil for higher mileage engines."