That's good news if the belts are in good shape and appear to be close to in time.
Look closer on the timing check. If it is 1 full tooth off, that might mean the front or rear belt jumped. If it is HALF a tooth off it might mean the front crankshaft gear is slipping and about to shear due to an incorrectly installed front bolt which, if true, means your engine is very close to self destructing!
Go through the list of checks I posted above. Check that front crankshaft bolt. Look more closely at timing. Timing is critical on these engines. Either it's right, or it's wrong. There's no such thing as "close enough". Needless to say, if it comes completely out of time due to a belt or gear problem, then you're going to be sadly saying goodbye to the entire engine.
It sounds like your issue might have been air leaking into the injection pump from a bad fuel line if replacing that hose helped it. Does it now start and run just as well as it used to before it had the problems? Or is it still not quite right? You may be dealing with multiple things at once that need to be addressed. Common in a 40 year old car.
