which small block a body aluminum intake?

Check out the Weiand Stealth. This is available new. There are measurements at this site.
Weiand 8022WND Weiand Stealth™ Intake - Chrysler Small Block V8

Mopar Performance sold what was pretty much an aluminum version of the stock iron intake. So plenty of clearance. They've been out of production for several years now, they'll be where you find them. Part number P4876335 *I think* I can get you pictures of mine if you need measurements, but it's very close to the iron intake, which was pretty good.