Deuce Lover is correct (as usual

) - there are certain brands and models of heads that were specifically designed to use the stock-length studs. That would be the route I'd take as there is no reliable way to remove the old studs with the engine in the car - usually it takes a complete tear-down, some praying to higher powers, a bit of torch/tig work and other such fun. So don't attempt that!
If you do the aluminum head route, make sure you put a good dose on anti-seize on the sides of the studs - helps prevent corrosion and also might help you get the heads off at a later date.
Here is a pic of a set of Navarro heads. Barney wanted to make sure folks could bolt these onto an engine and not have to replace the stock studs - as did Edmunds, certain Offenhauser models, etc..
2022-09-04_9-45-02.jpg