Depends on what boost you want to run of the 4EFE.
How much are you willing to spend ? The cost of the swap and all will be so much that you can spend that much on routine maintainence for a long time.
Sirf engine nae dalna ... sab change hoga ... new mounts wagaira ... and if you want reliability ... engine leykar uspar bhe karcha hoga, new gaskits, seals, rings, running of 1000km jis ka petrol mashAllah sey koe sasta nae.