Is it still worth it to maintain?

But it's very difficult to maintain, I went to a few workshops and they just can't get the right parts,

Haha, If I have his money and power, I would be able to restore classic Rolls Royce, custom make the entire engine. 

I keep my proton pusaka under a roof, with tarpaulin cover.

No money for temperature controlled garage. 

Sadly the best solution for your engine spare part problems is to transplant in a newer generation half cut engine where there are still spare parts available.

I also wanted to say this, maybe transplant newer engine (fr Iswara) to it.

My 1993 ISwara Auto was choking like mad for many months. My Mechanic did whatever necessary...tukar spark plugs, plug cables, changed fuses, tuned the Carb, new petrol filter. etc you name it.

Finally when the car mati one day and totally cannot start, the tow truck tarik my car to the mechanic. CHanged to new starter...ok can jalan but still choking. I got so fed up of it until I almost wanted to sell it off cheaply. But before that I thought why not I let a Carb specialist look at it ?

Left my car with him for 7 days. He OVERHAULED the Carb. RM300 only. Quite a complicated job and very few people have the skill and patience to carefully overhaul the entire Carb. I tested the car after that.... OMG.... the car was sooooooooooo powerful!! Best yet....dah la so powerful but also JIMAT petrol!!

If your iSWARA'S CARB HAS NEVER BEEN OVERHAULED.... I strongly recommend you do this. After that you will fall in love with your Iswara again. It is like driving a new car again. You tekan sikit je the car will go without hesitation. I was pleasantly surprised that my mileage per full tank also increased a lot after this.

Photo below was shot after he stripped apart the Carb. After that he cleaned all the parts with petrol carefully and slowly. My Carb was choked with so much dirt and its internals were also no longer tight. AFter he cleaned it...wow!

If u think using a Carb spray cleaner is sufficient, I can assure you that its not good enough cos very little dirt is removed. You have to OVERHAUL it and TOTALY remove all the dirts trapped inside...and no matter how much spray you use also no use.

Now i REALLY fell in love with my Iswara all over again. Never imagined this old car can still make me excited after 31 years. So glad I sent the Carb for a full overhaul instead of selling the car. Now I will never sell the car. The good thing is the Carb wont kacau or cause any issue for the next 20 years.

you're a good son.  can i ask if your dad is still around.

it's difficult to maintain a car that is not driven regularly.

if you can't drive it often, more problem come when you actually want to drive it.