leave it to the pro's m8 its not as simple as undoing a few bolts and whipping it out if the timings out you'll be in big touble when you put it back in.
new timing belt and gaskets are must aswell as getting it skimmed if your keeping it for a while its just another job done that wont need doing in the future and while your at it do the rocker cover gaskit aswell mk2's use a cork type roker/gaskit get 1 from an early mk3 there made of rubber and last alot longer.
if you want a good price stay clear of main stream garages there a bunch of robbing bastards. With a credit crunch in full swing a mobile macanic/dab hand with a spanner bloke is your best bet then get it sent to the mainland where prices are alot cheaper as said before gsf southampton is your best bet to sorce the parts you need.
GSF Car Parts Ltd
New Forest Enterprise Centre, Unit 21,
Rushington Bus Park, Totton, Southampton SO40 9LA
Tel: 02380 863900
gsfcarparts.com then click branches.