Okay, you probably already know but I have to ask. Were all the front control arm bolts loose when you dropped the car down and installed the engine? Tightening the bolts with the suspension hanging will preload the bushings and they'll hold the front end up.
I wouldn't think a 442 with AC would be that much heavier than a BBC non-AC. Some, but not 3 inches worth.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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