If you haven't already, yank the metal RF shield. Keep it, but just get it off the computer.
A '486 cooling fan/heatsink combo attached to the 030 should keep it icy cold. If you don't want to monkey with the fan's power connection, at least use a heatsink. You could also jack up the bottom of the 1200's case a bit by sticking a stack of two coins under each "foot" of the case.
That's my recommendation anyway.
