you have a GLi..
you should just boost it as it is, rather than getting an engine conversion..
if you blow it, it's cheaper to replace a d-series engine compared to a b or even a k

you won't need to convert it to EFI, as it's already equipped..

if you do get more power, what you should look into, is getting your rear drums replaced with discs, and get bigger front brakes..

but if you insist in doing an engine conversion..
b-series engines would be one of the easiest to do..
compared to other engines.. e.g. k-series engines

but replacing the d with a d-series vtec would be the easiest..

but you'll still have to rewire your car for vtec..
so you still have a bit to mess around with..

but as i suggested before, just boost it.. bang for buck..