59A-B heads "loose" but stuck

You can use wheel studs in metric that have 14x1.25mm attached to a puller and get good results.Many new vehicles have this thread.

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I recently faced a similar issue on a pair of 21 stud aluminum heads that I was trying to save. I took a 1/4 thick piece of 10" wide flat stock steel and cut it to fit over the heads. Then I located the spark plug holes on the steel and drilled out the holes to 1/16" larger than the plug hole diameter. I then took four old plug cores and welded some all thread on them long enough to go above the tops of the longest studs plus 2 inches. Then loosened the stud nuts and moved them to the top of the studs to use as a base for the flat stock plate. Screw in the plug cores to the head, lower the steel plate, 4 nuts and washers and they both came off very easily.

All had been soaking in acetone/ATF mix for 2 weeks.

If anyone wants pictures or dimensions, just let me know.
 
Update: I got the engine back from the machine shop! Whooo Hooo!
Now I'm looking for some other feedback.
I either need to re-core my radiator or buy a new one. I can get a re-core done locally, but evidently a new one from Classic Radiator in Farmingdale NY is substantially cheaper even with shipping. Has anyone had experience with this shop? I'm open to suggestions on this "coin flip". I just got back my engine from the machine shop and don't want "cheap out" on cooling it... but don't want to spend money unnecessarily either.
Thanks!
 
Another consideration, spend some time cleaning out the water passages. Especially around the rear cylinders. There is almost always a lot of casting sand and wire still in there. It can be an eye opener the amount of stuff hiding in there!
 
Make a couple of holes on that plate and use a large Slide Hammer. It will come right off. especially if the heads are broke loose.
 
At least the two of you are getting on it. It's good that you are sticking with the project. I understand that sometimes professional help or just some new blood is needed to keep things going. Keep us informed with progress and don't forget we like pictures!
 
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Thanks for all your input!
Another update: OK, some locals turned me on to a shop nearby that can re-core my radiator for not much more than a new unit. It's definitely leaking in the core. So this is a good solution for me. The upper and lower tanks are good, and now I get to keep them.
Here's a pic of the engine as of today.
 

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Here's a mini update to, what seems to be, the worlds longest project. The engine and transmission are back in the car! Whooo hooo. There's a good chance it will be running before the end of the decade. Ha! Next step is to set up the intake with a couple of 97s, then sort out some wiring confusion before attempting a start.
 

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Good looking engine. You may want to break it in on one carb, a lot easier to do. Then add the other carb later.
 
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