This sounds so like my present position that it's spooky!
I have just finished rebuilding the engine also, after HGF, and whilst she turns over she won't catch.
Replaced all the gaskets, etc etc.
My first thought was that I've got the cambelt off by one tooth on one of the camshafts but then I also wondered if I'd got the distributor on the right way round, as it seems you can assembly it 180 degrees out. Can anyone confirm the lead to spark plug 1 should be at the top, and 4 at the bottom?
Failing this I'm going to pop the cover off the cambelt again tomorrow and check everything lines up properly. Buggar of a job fitting the cambelt with the engine in the car still.
If your timing is out by a tooth that is normal.
Re-check the timing marks:
Proper allignment reading left to right is
INLET CAM
< exhaust - in> CAM LOCK TOOL GOES HERE
<exhaust - in> EXHAUST CAM
I dont think Haynes actually states the above, it shows you a black and white pic which you can hardly decipher.
The dizzy cap can only go on one way, the bolts are offset, the connections are all numbered on the outside of the cap.
Fitting the cambelt is done by fitting anti-clockwise.
On to the crank pulley first, then exhaust cam, follwed by inlet cam.
Wrap around water pump, then with the tensioner removed place the belt around it. Then offer up the tensioner bolt to the hole, tighten until tensioner is in place, job done!
set according to manual or automatic tensioner settings. The tensioner pulley is on a cam, so if you over tension then you just reset and start again. You cant actually over tension the belt due to the cam. Most importantly rotate the crank by hand two revolutions, then recheck the timing hasnt slipped. Then start her up.
NI goes off to pack tool kit for a cheap flight to N.Yorkshire and Scotland

Will work for food and beer tokens