Check it out and see if any of these cards can work for you. I have nevered used one, but we can always try to find the answers to your questions. One half has a zillion pins on the bottom to match the pins on the bottom of a 68040. The other half has 68040 with a gnarly heat sink on top. I would recommend stayinf away from the BST-40f until they are tested with the Amiga products.
Installation is pretty simple.
The instructions that come with the Quad Doubler are clear and well illustrated. Then you plug the Quad Doubler into the CPU socket. Put the case back on, plug everything back in, and you're in business. Tap Pic Go to products and then to QuadDoublers on the Sonnet website. Integrated Paged Memory Management Unit.