I was wondering for the OE poster. If he has not a hi stall converter, the getting one, even a cheap one, well, kind of throws "Cheap" out the window some. ($$$ Dependent of course on the verter price)
Trying to work within the confines of Cheap and what he has allready, the stall of the converter limits the cam choices. For a cam choice, if the converter is a low stall, I'm guessing a OE road runner cam would be too much. Do-able, but a bit much for the OE low stall.
Also, Is there a hi stall for '78 model years? Not to thread hi-jack, but I have a '78 P code 400 & 727.
What was the gear ratio of this car again?