I'm picking up a '91 C3500 ext cab dooley tomorrow, 454, etc. Has anyone swapped out the SM465 for a NV4500? I'm curious as to what bell housing to use. I don't believe the original will work. Can anyone help?
there is 2 different bolt patterns on the bellhousing.
there is also a couple of different boltpatterns for nv4500s IIRC.
have yet to see verified if the extra BP on the Bellhousing fits one of the nv4500s.
if you discover the answer please post up.
even an image with a ruler/square laid on the bellhousing or nv4500 may give enough to determine it
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