PS, The external tube that connects the bell housing end to the transmission bell is easy. A machine shop can cut the tube and machine out the weld and remaining tube stub. Then just add in the correct length of 5 inch 6061 - index it correctly - tack - and then alum tig the entire seam up.
Check with Rodger from Ironworks here on the site as he can reference a machine shop that did the work for 3 of his builds.
Jim
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