67 Delmont 88 to 8.5" Caprice Differential
#1
67 Delmont 88 to 8.5" Caprice Differential
I have a 1967 Delmont 88 with a 455 and a 4 speed manual. The rear is a 9-3/8" O-type posi with 2.73 or 2.78 gears. It is in good shape but it's a bear to pull out with (since the cam is larger than stock).
I can get an 8.5" 3.08 posi for $350 from a 1993 Caprice police car. It's my understanding that this rear will bolt right into a 1967 B body.
I am concerned that this rear rear will hold up to a slightly built 455. Has anyone done this?
Also, has anyone started making gears for the big O-type rear yet?
Thanks,
Chris
I can get an 8.5" 3.08 posi for $350 from a 1993 Caprice police car. It's my understanding that this rear will bolt right into a 1967 B body.
I am concerned that this rear rear will hold up to a slightly built 455. Has anyone done this?
Also, has anyone started making gears for the big O-type rear yet?
Thanks,
Chris
#2
Rear end issues.
I have a 1967 Delmont 88 with a 455 and a 4 speed manual. The rear is a 9-3/8" O-type posi with 2.73 or 2.78 gears. It is in good shape but it's a bear to pull out with (since the cam is larger than stock).
I can get an 8.5" 3.08 posi for $350 from a 1993 Caprice police car. It's my understanding that this rear will bolt right into a 1967 B body.
I am concerned that this rear rear will hold up to a slightly built 455. Has anyone done this?
Also, has anyone started making gears for the big O-type rear yet?
Thanks,
Chris
I can get an 8.5" 3.08 posi for $350 from a 1993 Caprice police car. It's my understanding that this rear will bolt right into a 1967 B body.
I am concerned that this rear rear will hold up to a slightly built 455. Has anyone done this?
Also, has anyone started making gears for the big O-type rear yet?
Thanks,
Chris
Just remove the BIG cam and recam with a good smaller torque cam
260-268 duration cam
#4
Buick 9.3 is another rear that is totally obsolete to aftermarket parts too.
Pontiac 8.875 is the only FULL size rear from the 1965-1970 era that has a gear set in the aftermarket being 3.55 gear sets.
Pontiac and olds do share the Pontiac rear - The low HP Olds got the Pontiac 8.875 rears so there is that option if you need a solid big car rear.
I have a shelf full of posi units and 3-4 sets of 3.55 NEW gear sets.
Now the problem is that is all expensive stuff. LIKE most of the big car stuff.
Jim
J D
#8
Thanks!
I have a posi 2.73 or 2.78 but could use gears. Will 3.55's fit in that unit? If I remember correctly from an earlier post, 3.24's are the lowest that will work in the 9-3/8" unit with 2.7X's. Since I don't race the car 3.24's would work although 3.55's would be even better.
Have any of you guys put in an aftermarket rear that has the same spring and shock perches as well as trailing arm connections as the B body that would take a Ford 9"?
I have a posi 2.73 or 2.78 but could use gears. Will 3.55's fit in that unit? If I remember correctly from an earlier post, 3.24's are the lowest that will work in the 9-3/8" unit with 2.7X's. Since I don't race the car 3.24's would work although 3.55's would be even better.
Have any of you guys put in an aftermarket rear that has the same spring and shock perches as well as trailing arm connections as the B body that would take a Ford 9"?
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