My vote is go with the TQ but ya can't really go by me - I'm running (4) of them. What year Imp are ya working on?
It's a large by huge 72 Imperial crew cab.
As opposed to those tiny coupes?
When it comes to big barges the fuselage ones have always been my faves. 70 ish 300 drop top on the bucket list. TQs really fit the luxo cruiser well - mild and quiet when running on just the primaries, terrifying in a refined and civilized way when you hold them all the way open. Depends on the gear. Later Imps had higher gears and I've driven a couple 74s and 75s that would shift in to 3rd around 80 mph. About the time the passengers start getting uncomfortable about how wound up the big block is and wondering if it will ever shift, it does and they really start to worry because it's still pulling like an aircraft tug.