Replacing the subframe bushings

Hello! I’d like to know if replacing them is possible by hand with a threaded rod and adapters (and a brute force). I can buy a 3/4" acme threaded steel rod with nuts. They seem to have pretty strong threads. Or I need to find a shop with a side hydraulic press?
Thank you.

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What are the subframe bushings?

Front subframe rear bushing. The subframe holds the engine and the front suspension. You’ll find pictures if you google XJ40 or xj6 front subframe.