DO IT! Just think of it as two separate components, head and block. Once you have the head off and you dismantle it you'll soon see its a lot easier to work on than you may think. When you have the head dismantled, get it cleaned in a hot tank, crack tested and skimmed, will almost be as good as new. Granted the block is more indepth if your going to rebuild it, if you want it doing 'propa' it's going to have to go to a machine shop to get measured up. If rebore-ing cylinders and regrinding cranks are involved then the pennies are soon going to turn into pounds! But however, if you've got faith in your crank and bores, replacing bearings and rings is again easy work. Theres an entire step by step guide on YouTube by (think his name is) Barry McGowan, on how to rebuild the mk2 engine. Doing it yourself I think is very rewarding. For a one you can put a sticker in your rear window saying 'built not bought', and two, you can feel really intelligent when you go to the stealers and ask for pressure plate to crankshaft bolts, have an argument with the parts geeza for 10 minutes about how your right that the plate bolts to the crankshaft and he's wrong whilst he points to his little diagrams on his computer, and then feel all smug when you pull up a picture on your phone showing him that the pressure plate does bolt to the crankshaft and that he is indeed WRONG!!! Sorry to rant but you get the idea!