I run a Crower 60242 in my 400 with 9.6 CR. A little lope. It was kind of a toss up if I wanted to run the 60242 or 60243, as my car is a stick.
That’s the engine in my signature. Don’t pay too much attention to the 13.9 track time, I granny shift because it’s still the original transmission. The 102 MPH is the better indicator of its performance.
Video of idle and getting on it-
https://m.youtube.com/shorts/OLj_dTEcPmI
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71' GTO -original 400/4-speed/3.23 posi
13.95 @ 102.1 on street tires @ 4055lbs.
‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears.