I disagree, a Cleveland that he owns will give more bang for buck than any Windsor could.
If it's a 4v, get the port plates from MPG Head Service
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If it's a 2v, get some Aussie 2v's, possibly from Power Heads
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Or if it's a 4v, go this route aswell.
If you want aftermarket aluminum heads, go with CHI 2v or "3v's"
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Or you can take your iron 4v or 2v heads and make them flow not far off the cfm rates of most aftermarket Windsor heads, for the price of a die grinder and some sandpaper rolls.
As far as the restomod stuff, lowering is the main thing. Get some high rate (620 lb/in) coils and cut them if need be, get some high rate rear leafs and if they need lowering you take a leaf off your OE springs and bolt it on upside down on the new leafs.
Get some Bilstein shocks.
Tires, I'm not sure what size to get for a '71, but here's the place to get the chart to tell you:
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Rims, 17 or 18 inch. I like Raceline GT's, go with the polished ones b/c I've already got the powdercoated ones and you don't want to be a copycat.
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If you prefer 5-spokes get Boyd Smoothie 2's:
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UNDER NO CIRCUMSTANCES SHOULD YOU GET AMERICAN RACING TORQUE THRUST II'S OR D'S. OR ANY OF THEIR CLONES. I will hunt you down and kill you if you do.
If you've got major budget, get Team III AC III's with the half polish, the spinners, and the lugnut covers
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With the big rims you've gotta have some big brakes. 13" Baer Claws or Stainless Steel Brakes Force 10.
Follow my advice and you have just added $10,000 of stuff to a $5000 '71 Mustang. In other words, welcome to the club.
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