I have some replacement heads out of a junkyard. I am wanting to
repair this vehicle as cheaply as possible. The heads are rough
looking, rust inside the valve and everything. I will say that I
filled up the intake ports with cleaner and it held overnight. (Paint
thinner).

Someone told me if I take the valves out to clean everything, It might
not seal right when I put it back togther, and I could have a miss or
check engine light.

My origional intention was to take it apart to clean it and to lap the
valves. (And install new valve guides that came with my kit).

The guy at the salvage yard said they came off a motor with a lower
end knock. The heads were checked for flatness and are within .001.
They were taken off the motor a day or so before we got them.

I need to get this thign going cheaply. I am going to get rid of it.
SHould I leave the heads alone and just mount on the truck or take
apart, lap the valves, etc?

I know the "ideal" thing to do would be a valve job, tanked, etc, but
around her eit is alot of money and I plan to get rid of it.

Thanks for any advice!