Very likely needs rocker arms at that mileage. Not too hard or expensive to do but if ignored will end up dropping a valve, ruining a cam and sucking pieces of the rocker arm and needle bearings into the intake. They all have that problem sooner or later. Starts with the ticking and eventually develops into a dead miss on a cylinder but at that point it’s too late

They also like to blow spark plugs threads and all out of the heads or just break off when you try to remove them. In either case you’d need a triton 2 valve spark plug thread repair kit or take it in but that’s not too big a deal. Letting rocker arms go will leave you upside down in it quick style though

How did you check spark? Crank no start on these is usually the ignition coil. Often enough I kept one in my box so I could try it before I would even bother pushing it in. It’s inside the distributor cap

Only time I’ve ever seen a problem from jump starting was because the leads got hooked up backwards