Dave-
I know I've posted this info before, but in case you didn't see it, here it is again.
I have a 1970 292 / .040 overbore to 301 CID., 270 Wolverine Cam, comp cam Rockers, New Stovebolt headers, 3x2 Holley/Webers/electric chokes, Water heated Offey intake, Petronix electronic ignition, electric fan.
I have a '83 Z-28 T-5 tranny with a '68 nova 10-bolt rear with 3:55. It starts with a flick of the switch, has fantastic low end torque, and cruises on the freeway with only a quarter of the pedal used. It tachs at 1850 rpm @ 65 mph. It passes cars on the road like a 250lb Pro Football Fullback pushing you in the back on a tochdown run. I'm not that concerned with milage becase it's not a daily driver and wasn't built for high milage! I get 14 mpg which is reasonable for a 3000lb car with a BIG BLOCK MOTOR!
If you are not Drag Racing and want a cool sounding and smooth shifting tranny for the street, then I prefer the T-5. I've heard the Richmond 5 & 6 speed tranny is very cool too, but that's a whole lot of $$$ and for racing too.
RapRap
1940 Chevy Coupe