gunk under intake manifold

70dart318 said

Thanks for the tips and ideas, I want to spend as little as possible right now cause I just want to get it back on the road. I’m gonna carefully clean up what I can and see how it looks then.
The rust inside the intake manifold where the thermostat housing is...would it be best just to replace it with another 318 2bbl intake or is there a way to clean inside there and get it off?

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Radiator flush (a couple of times backflushed)
Shop vac while you break that crap up, and then flush the engine out with kerosene, diesel or solvent then trans fluid with fresh oil and filter.
Then change it after about 100 miles of running.
This is your best chance and an inexpensive way to save it.
Even if you don't get crap all over the cam and lifters, it still ends up all over the rotating assy. Not good so the shop vac will minimize that.
IMO anyway.:D