Not seen that style mount, thought it was the same as mk3 golf.
I don't even know if you can fit that mount on the JR, tho I still wouldn't put it in if it did.
Looking at my 1z it seems you'll have clearance issues at the front of the engine with the alternator, changing the oil filter will be an engine out job and the dipstick will go through the rad!
all 4cyl flywheels and gearboxes should be interchangeable