Precisely, why I don't recommend any paste (it won't hold it in place without brackets). use thermal tape. The 68030 is just like 386 doesn't require a ton of cooling. the arctic stuff is an overkill. PM if you want thermal tape plus heatsink plus fan (low profile). make an offer. I had this GVP 030 10 years ago. The fan alone will do more than enough. This isn't a Pentium CPU that requires a heatsink the size of a fridge and fan. ;-) The notes about thermal tape are for the new CPUs.
Check your jumper settings and crystal clock (hope no one overclocked it.)
Ok, thanks for the info. Now with this arctic silvers, it states to keep it away from electrical traces.
Barney