V-8 Fuel Milage

["Bruce Hevner" <scramblr@xxxxxxxxxxx>]

Come to think of it I DID do some head swapping on my 343 Javelin one time. 
I had taken the OE heads off to do some work on them and needed to get the
car rolling again. All I had was a set of 290 heads I had taken in trade
from a 290 AMX that I had installed a set of big valve heads on. 
 They were only on the car for a few weeks so I don't remember much other
than it made a big difference in response and fuel mileage went up a few
points (who cared back in 1969!!). I DO remember that I had problems getting
the thing to shift at full throttle. I had modified the auto trans to shift
at about 5000 RPM and those heads cut it back so much it had trouble getting
there! Once it got to about 4500 I would have to lift the throttle a little
so it would shift. Probably would have been perfect with a stock trans.
  I think MOST engines back then were really to much of a trade off of
trying to be good at the bottom end AND top end too. 
Bruce Hevner