Re: Yenko turbo 400 speedo adaptor
 

No, not all Muncies hooked to a 4.10 got the adaptor. Depended on which Muncie model it was, there were two different size speedo drive gears.

Re: Yenko turbo 400 speedo adapter
 

Should the 9737 Camaro with 4 speed have the adapter? 9737 with auto?

Re: Yenko turbo 400 speedo adapter
 

Yes

Re: Yenko turbo 400 speedo adapter
 

Is this the little 90 degree adapter that shows on the AIM? I have one, but was not sure if I should be using it.

Re: Yenko turbo 400 speedo adapter
 

That sounds like it.

Re: Yenko turbo 400 speedo adapter
 

So with 235 70 15 tires and a 3.73 rear, will I need it?

Re: Yenko turbo 400 speedo adapter
 

With a manual transmission, No.

Re: Yenko turbo 400 speedo adapter
 

[ QUOTE ]
Should the 9737 Camaro with 4 speed have the adapter?

[/ QUOTE ]
Maybe. Some 4.10 rears got them, some didn't. Depended on plant inventory. I have documentation on several Z's with 4.10's and no adapter. Tire size shouldn't be a factor, but Z's had 15x7's anyway.

Re: Yenko turbo 400 speedo adapter
 

This part:
Stewart Warner
GGGF X1 (or 666F X1)
1.300 J
Is specific to a solid lifter L-78,L-89,4.10 or higher w/TH400.
It is manditory for a COPO L-72 or ZL-1 w/TH400 in leiu of the fact a 4.10 was standard rear,with higher gears optional. I am not sure of the M-22 or M-21 4 speed application............

Re: Yenko turbo 400 speedo adapter
 

I have a speedo reducer chart on my web site rl=http://www.copo.com/speedo-reducer.htm