4g61 timing belt (turbo and non-turbo) is two teeth shorter than the 4g63. Get a quality belt and you will be fine.
The intake and exhaust cams markings should line up side by side when timing is setup properly.
IF things are misaligned, you need to confirm if you have bent valves.
Hyundai Elantra 1.6L composite gasket is just fine for all but high powered turbo cars because it's the same gasket the turbo cars use, but hopefully with closer matching bore sizes to the 1.6L cylinders with minimal bore increase to accomodate engines assembled after machining and getting new wider pistons.
We have seen FelPro gaskets designed for 4g63's that had overbore sizing big enough to suit overbored 4g64 pistons!
Only way to confirm a turbo block, is to look at the piston tops (61DT? markings), or inspect for oil squirters (pan off, but EDM got them with higher compression pistons in NA form).
I put a post about cylinder heads that were eqipped on all the sirius motors we got or were swapping into CSM worldwide, and some of that stuff applies to NA motor setups also.
Check the engine archives or that.
I suppose if the engine was a turbo (but not proving the bottom end is not NA and match turbo pistons/squirters), you can check for turbo cams which after measurement you can compare to the parts listed in the engine manuals located at
http://www.lilevo.com/mirage/ Just be aware that specs were different on JDM cams, compared to the lazy USDM cam setups and lower power that resulted (also no intercooler, oil cooler etc on a 4g61t US stateside and Canadian).
Get the engine lined up, then see what happens with spark plugs in it. Should be hard to rotate over. If it's not, check for internal issue with a leakdown tester (slightly different from a compression tester), or pull the head. You are likely pulling the head to confirm and clean up many questions about condition. Better to do it all once, eh?
Also buy good timing components, and all of them! Mitsu/Hyundai tensioner, GBM bearing in the idler pulley.