Oh I hear ya all. We put a 518 in my buddy's 70 Cuda vert 2 years ago. Then I drove it the 800 mile trip to Reno for HAN. With the top down all the way.
I've done several TKO conversions and I don't really like that setup.
Was thinking of doing the T-56 but don't want to build a new tunnel so I'm bellying up to the bar and doing the Passion 855. Just put one in my Buddy's 70 Challenger R/T this summer and it is really nice.
Think I'll put a 518 in my 72 SSP beings it has a 727 now.