Hey guys this is my first car, a 1981 626...

Getting it registered very soon.
I'll be using this car as a daily driver but have some ideas for it.
Before I go on I should mention that I love Japanese racing cars of the 70's and early 80's and love classic rally cars too. Any type of historic racing car turns me on in fact.
This is the type of stuff I like:
http://www.youtube.com/watch?v=qgCJiZhH__E.
Cosmetically I want to leave the car as it is besides getting some wheels like those Epsilons or similar, Gloss black mesh with chrome rim. Hoping to find something on the cheap side.
To go with those wheels I want to find some racing tires, preferably reproductions of 70's racing crossply or radials. If anyone can suggest some tires I'd appreciate that, Dunlop does some but their information is vague. The reason I want these is just for use on weekends when I'm out driving for fun, maybe the odd track day. The rest of the time I'll just bolt the stock wheels on with road tires. It might sound silly but If I want to get into racing I think driving on race tires every chance I can get is a good way for me to get used to them and learn to drive in a certain manner.
I'm not into the ultra low thing, suspension needs some room to actually work so the car stays relatively stock height wise, replaced some suspension & steering parts however which has been an improvement. Quite chuffed with what I've fixed on it so far as I've never worked on a car on my own before, pretty simple machine really, nothing's fallen off yet!
As for the engine... it's the standard MA 2L and seems to run fine, car has 170xxx Km on the clock and was owned by an old guy for most of it's life.
I've found where I can buy a manifold for a Weber 45 DCOE carb, but I've seen mixed emotions about what these engines can do, one guy on THIS forum reckons he's turbocharged, supercharged them etc. and they've been good, people on another site reckon they're doomed to be a clagger and have no potential. To be honest I'd be quite happy if I only had minimal gains in power from ditching the emissions crap that's sucking in hot air and exhaust fumes, fitting a Weber, having an open exhaust system made, and tuning it as best I can, as long as the car sounded awesome and the responsiveness was improved. I'm interested to know what can be done to the engine itself, if I did the above mods would I benefit from any porting? Camshaft upgrades etc?
Hope someone who has experience with the MA motors can tell me what I can expect and what I should look at doing.
I'll keep you up to date with things if I go down this path and maybe we'll see if these cars can perform well with basic mods or at least be more fun than you would think.
Cheers.