Coolant in the oil is not good, because you have no idea how long the coolant was mixing with the oil.......when that happens, you have potential bearing problems .....
1200 is a lot of money for a head job......you did the work yourself? No way there is 1200 in parts......
The horse is out of the barn so to speak......
You should have started the engine, to check it out.......should have dropped the oil and filter(don't circulate any more coolant), and replaced......then started the car before any work was done......you would have found the engine was seized before doing all this work.......
There are a ton of these motors in the boneyards.......could easily get a low mileage one for under $400......but there is no guarantee you would develop a lower intake problem down the road....
You bought a car that is over 20 years old.....1200 is more than the car is worth.......
I'm sure you had your reasons, and tried to fix it yourself........but unfortunately, you are now in a hole.......
You never mentioned the mileage or condition of the vehicle....vehicles this old, and if you live in a "Salt Zone" in the winter time, usually are rusted up badly underneath......suspension, brake lines, fuel lines, exhaust, etc.......
Plus, you had no idea what condition the tranny was in........
I'm sorry to bring you all this bad news......buying a used vehicle that runs, is a gamble, even if checked out.....buying something that doesn't even run, is just asking for trouble, unless of course, you have money to burn and plenty of time on your hands......but you are not the first person to have this happen to.....one of life's lessons.....
If still adamant on fixing this, a boneyard engine is the way to go......engine easily removed from the top with the hood removed.......just have to block up the transmission pan, to keep it level(it will want to drop when the engine is removed....and makes alignment better when reinstalling the engine......basically remove the flex plate bolts....tranny to block bolts(there is a hidden one you have to access from the passenger side with a long extension).......then disconnect harnesses, coolant lines and mounts, and then with an engine lift, remove the engine.....
Sorry you went through all that work without good results.....