Have ya tried the rams horn exhaust manifolds like 48 mentioned?

http://cgi.ebay.com/ebaymotors/ws/e...7&category=33632&sspagename=WDVW

Here is an example of the left side only. The mani's are out there. I had a set on my 41 with a 327 under the hood. The Rams Horns allowed me to keep the stock steering. Not sure about your AD tho....