Hi guys I own a 87 suzuki swift in very good condition and we are the first owner of it. The car is drove for approx 4 lac 50 thousand kms. Its Engine was once overhauled in late 90's and now its again weak and started eating oil.
I want your suggestion that shall I go for complete engine overhaul with head filling,oversize piston,gear box change(gears make noise in shifting,very hard shifting especially for 1st gear) all this work will cost me approx 70k. So, Is this a good option or I shall go for a Engine swap? Which option will be better for me?
If you are suggesting me a swap then kindly refer me some good engines with minimum alteration. Make sure car is a daily runner and I want to run it on cng and ac is must.
I am attaching some pictures for the reference these pics are 2 years old but still car is in good condition....

