Ritchy the flat where the timing belt gear locates is worn, the garage have done some sort of fix to make it run

Find out exactly whats wrong with yours first mate, no point splashing out till you know just what the problem is & feel sorry for you having to spend so much & getting nowhere,
must be very frustrating.
Im not in a hurry to sell my old engine as it's not on Ebay or Gumtree,
least you know it's here if you need it.
Ritchy put the same cams into his 1.6 & can vouch for increase in power,
with Z&F map it will have been quicker than your 120.
The option of you trying for a cheeky trade in might not be a bad idea &
would get you some of the money back you have already spent

Maybe I'm not describing the power loss correctly. It doesn't 'lose' power as such, just doesn't really gain any when you accelerate at certain revs. Like I say the revs rise but the car doesnt gain speed, then all of a sudden its as though something connects and everthings back to normal. It's as though something's slipping.

Cheers Marcus, will be in touch if I think it's an option. Just a shame your so far away!

No !! it's a shame that YOU are so far away.
up here we have Ritchy & Goldie on hand for help
Maybe you should move. lol

i`m not believing this Matt. Frustrating you`re so far away!!

Yeh sorry, I should move up there! My mates in Perth atm, I should of tagged along but not sure what his misses would say on there honeymoon! Lol
I'm gona run the car for a few weeks, see how it goes then decide what to do.

did they put a new gear on it?

only thing i can think is the woodruff key is perhaps worn meaning the crank pulley gear is slighty off, but you can replace that, and the crankshaft gear is also replaceable, but even at that it would have to be very worn to actually effect the cars running. what your describing does sound like a timing issue

It doesn't have a Woodruff key Ritchy, it locates on a flat on the nose of the crankshaft.