The SE/30 guts are a complete bundle that can only work together:
Logic board, analogue board, power supply and connectors, CRT (there is another thread about CRT swaps) and connectors. Some parts of that bundle are shared with other Macs, and the SE is the obvious match.
If you have the whole bundle, installation in a different compact Mac chassis is primarily a physical problem: components were mounted in different places in different compact Macs. But the metal chassis is a serious problem. Early SE chassis, for example, don't have the cut out that allows an SE/30 PDS card to be mounted vertically.
As a weird hack, your suggestion is possible with a lot of work. If you just need a good host for your SE/30 guts, find a dead SE, preferrably a late model to avoid metal work.
Logic board, analogue board, power supply and connectors, CRT (there is another thread about CRT swaps) and connectors. Some parts of that bundle are shared with other Macs, and the SE is the obvious match.
If you have the whole bundle, installation in a different compact Mac chassis is primarily a physical problem: components were mounted in different places in different compact Macs. But the metal chassis is a serious problem. Early SE chassis, for example, don't have the cut out that allows an SE/30 PDS card to be mounted vertically.
As a weird hack, your suggestion is possible with a lot of work. If you just need a good host for your SE/30 guts, find a dead SE, preferrably a late model to avoid metal work.