we can quote on all Strange stuff if your interested.
and i'm with Duce 454
35 Spline gun drilled with profile milled flanges are 25% lighter than non gun drilled ( strange really only recomends these for a really light weight car keep this in mind) FYI the smaller the diameter of the part the less critical the weight becomes.
the 12 bolt drop in center for a 9" housing is 9 lb lighter than a 9" case (hasn't been all that popular tho)3% more efficiant.
i don't think there is much savings in the Sheet metal housings over the standard stamped housing just looks better. imo
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