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Re: is this crossmember 6 cyl manual only?
Bellhousing for the MY '68-later SM 465 has casting numbers: [GM5] 3925505 = 5-1/8'' diameter.
SM420 bellhousing was [GM11] 3815891 = 4-9/16'' dia.
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Every 25 years I like to rebuild that 292, whether it needs it or not.
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