The 093 heads would work fine, the compression ratio would be essentially the same as the 140 heads.
In 1964 the 10.5:1 389 engines used the same 345 (845) heads as the 2-barrel 8.6:1 326.
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
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