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1). You can run the exhaust directly into the sidepipe and instead of dumping the exhaust just in front of the back tyres, you duct it back in underneath the car and push the exhaust out the back. Before you decide on functioning side pipes, make sure you travel in a Cobra with working side pipes. There are a few considerations.
a) your right ear is less than a metre from the exit point - good for headaches on those long trips.
b) you only hear half the engine - the other half is somewhat quieter on the other side.
c) you (or more likely your unwitting passengers) can score themselves a nice burn if they're not careful. Unless you have heat shields which I reckon detract from them a bit.
For me, cosmetics is the way. Maybe down the track I'll pipe the exhaust through them but exit it out the back as above. As for legalities, as far as I know, it is illegal to direct exhaust toward the foot path/side walk. Therefore, you could just run the drivers side pipe if you wanted - you'd look like a dill though !
2). Radiators. Bigger is always best easpecially in Australia. Therefore, you put in what you can make fit. In the November 65 edition of Sports Car Graphic sitting in front of me, the 427SC had the radiator sitting at a very slight angle backwards at the top. However the street version looks more upright than the race version.
Just a warning, if you try to make your car look 'exactly' like the original, you'll go nuts. If you ask me, the originals look pretty untidy. Engine bay was ordinary, cockpit looks substandard (is it sacrilege to say this ??). Body looks great though.
Hope this helps,
Adrian.
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