Changing Head gasket -a prudent move?

Hi folks, Have been slowly renovating an 84 GTI cabrio over the last 15 months. Have run her for most weeks about 3 -8 miles but not pushed her at all during this time as wanting to check the bits I had done worked. Now ready for a good run out -but would it be wise to change the head gasket as a precaution. She seems to run okay, accelerate etc at moderate speeds but just worried that she hasnt been really put through her paces for a number of year. Is the head gasket easy to do or do I need garage technical help? Also anyone fitted a new roof and lives near Glasgow for some hints and tips??
Cheers

I wouldn't bother unless you suspect it's gone - it will either be ok or it wont, no middle ground really!

if it 'aint broke…

Just had mine done  mate and it frankly wouldn't bother unless you think it needs it.

Tian