TTI Exhaust on Early A's
We had to shim my 340 as well on my 1971 to get the TTIs to fit, and I did go with a new mini starter to provide more header clearance.
I believe you'll be happy with the "X" pipe. I have a video posted here:
http://www.forabodiesonly.com/mopar/video.php?do=viewdetails&videoid=64
if you're interested.
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