From memory, coolant does flow though intake manifold mouldings, so *could* be the intake manifold gasket. Be aware these vary between earlier and later k series (as do rocker cover gaskets and cambelt kits).
But HG is common failure. JLR have a newer MLS gasket that virtually overcomes the K series HG issue, but it works best with new oil rail (Ladder Rail) and bolts. The HG itself is easy enough (MUST MUST MUST use new bolts, ignore the workshop manuals able measuring them). Not done a ladder yet.
Mrs TB's HG has failed again (leaks coolant out of block), has been for a while, really should fix it this summer
. I intend to change HG, Ladder and bolts. Her first HG lasted 72k (1.6 K series)
Just buy her this and she will be happy.

Copyright: "The Bond Museum", Keswick
Ahh, the slayer of pikey wagons. 
Kevin
Yep I'm sure TB would get plenty of fun out of it too.
Nah, it'll be rattling its bag off within a week 
Oi! It wasn't entirely my fault 
There was another angry short bloke driving Goldie?

I was running late, because she was gasbagging for too long.... ....thus (using women's logic here) it was her fault....