275K mile EA81 Engine Questions

[newsoobdude]

I'm doing a temporary engine transplant into my BRAT. It's a 275K mile EA81 and was wondering besides the HGs, Water Pump, Oil Pump, and seals, what else should I replace w/o splitting the block? I don't think I'll put more than 25K miles on the temp motor but figure I might as well replace AT LEAST the HGs due to overheating due to electrical gremlins and making sure the surfaces aren't warped.