cylinder head

car for query Vauxall astra 1.4 petrol. 1998

Forgive me if this is obvious but..

The other day the fanbelt shreaded and somehow got pulled into the path

of the timing belt causing internal failure and a cracked head. i've been trying to get hold of a cylinder head since but keep hitting the same problem.

There seems to be two different types of fuel delivery system on these cars. The one i have has what i initially thought was a carb ( didn't figure tho- a 98 car with EML and this obsolete inefficient technology)

but later found out is a CFI or single point injection system and all the possible cylinder head replacements i,ve come across (3) have a long black rectangular black box which is called multi point FI.

Queries

1. is it possible to interchange these two systems ie could i put the head from a CFI onto my engine. Are there issues with wiring, sensors,exhaust intake manifold etc.

1. I actually got found a whole engine the same as mine for E300(UK

450).with lower mileage. Would it be better to just replace the whole engine, even tho this would require more yanking The Eml came on. Would

i have problems trying to restart this new engine. Do i need to get Vauxall to reset anything.

thanks in advance for any comments