Re: 727 a or b....rears 8 1/4 and 8 3/4

[rll <rlipinski3@xxxxxxx>]

r lipinski wrote:

> From: Gary H. <62to65mopar@xxxxxxxxxxx>
> Subject: RE: 727
>
>
>
> The bolt pattern spacing is different between the small & big block 
> A-727 trannys. Looking at the trans case, the measurement between the 
> top two bolt holes, at 11 o'clock and 1 o'clock position, measures 7 
> 3/4" for the small block & 6 7/16" for the big-block A-727.       
> The 8.25 has an inspection cover bolted on with, I think, 10 bolts, 
> while the 8.75 does not have an inspection cover.
>
> Thanks,
> Gary H.
>
>
> harry skalla wrote:
>
> > > I know to some of you these might seem like simple questions, but I 
> > > will never know if I don't ask. How do you tell a big block 727 from 
> > > a small block 727. The other question is how can you tell the 
> > > difference between a 8 3/4 and 8 1/4 rear end?  Thanks, Harry
> > > [Non-text portions of this message have been removed]
>
> The ironic thing about small block bell housings is that 4-speed small 
> blocks have a bolt hole at the very
> top (12 o'clock)...because the 11 and 1 or 10 and 2 holes are so far 
> part.
>
> I cleverly posted this fact to the MML and was shredded to 
> bids.....close together BB not so close small block.
>
> the flat portion of the case is another good hint.
>
> for the rear.....
>
> if your car has bolts to hold the gearset into the housing on the 
> u-joint side of the axle , you have an 8 3/4
> or a ford 9 inch...there where a few older variations in the 50s but 
> if you're not talking 50s then the statement
> will most likely stand.
>
> rob in phx
i should have added, that with my size hands, trying to span the 
distance of a small block's top bolt holes is a pain filled
stretch...the big block distance is easily spanned with even small hands....

a rule of thumbs (hands) of sorts...

rob on phx


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