The picture screams c4 to me

 

No.

289/302/351 have small block bell housing
390/428 is big block

Since the c6 has an integral bell housing (read not bolt on like c4) there are big block and small block c6 transmissions.
For the record also, a small block c6 trans will fit in a 65 mustang with the correct cross member and no modifications to the trans tunnel despite the fact that it is larger than the c4.

 

Thanks. I've seen claims the but I've been under the impression that the swap was not possible. Now for the record, what cars and what yearhad a small block C6 transmission? This would prove valuable to those looking for that kind of swap. One of the reasons that I bring this up is I grew up with the absolute 100 percent guaranteed belief that two identical cars, setup the same, with two identical engines, but one with a four speed manual and the other with an automatic (three speed) transmission that the four speed would do a quarter mile faster and quicker. Time has proved me to be wrong. An automatic transmission has consistantly beat a four speed, not 100 pct of the time, but enough times to indicate an automatic is better. (Boy is that statement going to cause havoc.)
So have at it.
Jim

 

Ok so this isa C4 then, i have it hooked up to a ratchet shifter and it seems pretty peppy i have a 302 hooked up to it. I can still use this for everyday use and try to haul @ss with it? or should i get tranny with overdrive ?

 

Im using my C4 as an everyday regular driver. If your planning on doing faster than 60 on a regular basis you could be up into the 3000 RPM range depending on what ratio of rear end you have

 

The only reason to have a tranny with an overdrive is if you do a lot of your driving on the freeway. I rarely ever use 5th gear in my Mach1 unless I am over 70 MPH.