We're kind of digressing from the OP's question.
The extra weight of the 440 (however much it is) is creating additional stress on the torsion bar crossmember. Likely, the 440 further aggravated an already existing condition. The extra weight has lowered the front end by the extra twist in the torsion bars themselves, PLUS the extra twist allowed by the tearing of the torsion bar crossmember itself. These two together have the effect of lowering the effective spring rate of the front end, making for sloppier handling - although possibly not noticeable.

1) Dialing up the t-bars to fix the ride height will solve, temporarily, any change in alignment. But the torsion bar crossmember will have to be repaired or replaced, before he finds himself driving home on his lower control arm bump stops.

2) Replacing the original bars is probably recommended, also, for two reasons. And I think most members here would concur. [1] Like any springs, bars wear out. After 40 years, his have probably outlived their usefulness. [2] The original bars are maybe .84, or perhaps .88 inches diameter. Going to at least .96 or maybe 1.00 will improve handling and still be a fairly comfortable ride.