Do you still have the original 429 SJ or SCJ motor?
Weren't there only 90 of those built? While you have the 460 in there you might as well top it off with a set of these.
http://www.jonkaaseracingengines.com...article&id=219
I'm not sure how I feel about modifying a care that rare and nice. But its yours and it should be on the road either way so enjoy. Welcome.