Different cam, so not a true point of comparison, but speaks to the idea that a cam with 224 @ .050 isn't too big for a 400:
I ran comp Magnum 270 (224 @.050,110 lsa, icl ended up at 107) in an approximate 8.6:1 400. Stock log manifolds, m-20, 3.73 gears. It was a little soft below 2000 but really came alive from 2500-5000. It was perfectly drivable at all speeds.
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'72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car!
'73 Firebird 350/4-speed Black on Black, mix & match.
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