Preamble

                                            What follows is one such example……
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Query

But altogether I will get a new larger car like handling and driving experience - closer to a Zen I suppose.

Please tell me how can I modify the front wheel hubs and rear wheel drums. Can I get the attachments made in a normal "lathe" workshop? Will I be able to get the thing done from some Rallyst ? Who can I approach for the purpose and do tell me the possible costs.

I have seen one such modification in an 800 and a Tata Estate at some traffic lights but could not ask the person how he’d done it.

My Response
My humble advice to you is to stay away from trying to turn a donkey into a race horse. Remember all of us are born with some physical limitations and these cannot be changed w/o adverse repercussions.
Notwithstanding, if u try to do a 'LAMA' (left against medical advice), u alone will be responsible for the consequences - which can be disastrous, including annulling of your OE Warranty, if any, but surely your Insurance cover. So don't be carried away with what some fool has done just because it looks good at the traffic lights to your impressionable mind.
I'd, therefore, like to share my views on this 'wide-track' phobia with you as follows - assuming you have at least 10+2 background in elementary Physics:

(I) Front Suspension/Steering

1) The Vital Geometry of it has three totally integrated and interlinked constituents - namely i) Castor, ii) Camber and iii) Toe-in. For linear cruise stability and 'self-centering ability, the importance of Correct Castor angle as designed by the OEM cannot be undermined.

And when you indulge in widening the track this major constituent will go for a six, with attendant consequences which can be disastrous, by way of loosing control over the vehicle in an emergency.

2) Similarly, the 'swing radius' of the Steering Rack track rods will enlarge and may result in 'loss of synch' with the main Suspension Arms' 'swing-radius'. This in turn will result in a 'wobble', especially over rough surfaces which are a plenty in here, which will be mistaken for lack of 'Wheel Balance'!

3) Further, the 'bending moment' at the stub-axles will go up in direct proportion to the extent of 'widening' and may more than eat into the 'safety margin' built into its OE design - which are all very ‘edgy' these days due to cut throat competition. Result - the whole wheel may come off under a severe pot-hole impact - the possibilities of which are again 'routine' in our Country.

4) Similarly, the entire steering linkage will be overly stressed, including the Power Steering Mechanism if any, resulting in premature wear/failures of its various constituents.

5) Lastly, you may have noticed that present day Cars' front track is a shade wider than the Rear. This is done again to ensure steering stability while cornering, to offset what is known as the 'Tripod-effect'.

The extent of front/rear track difference is a complex figure dependent on a lot of factors such as the basic steering geometry, the radii traced by the wheels' point of contact with road from 'lock-to-lock' movement AND the designed Wheel Base' of the Car.

So you can imagine what havoc this will cause to all these 'precariously balanced' equations when the front and rear tracks are 'arbitrarily' changed!

(II) Rear Suspension

Apart from the various fallouts of F/R tracks vs. wheel base relationships as elaborated above, the biggest danger here will be of the stub axles giving way under pot-hole impacts.

The consequences of loosing one or both wheels of the same side when going over a single pot hole even at a moderate speed are not too difficult to imagine, for any one who has held the Wheel of a Car for any appreciable length of time.

To sum-up, the next time you see a 'Dude' with 'done-up wheels' at the traffic lights, I am sure you know now where he's headed!