Jim,
How did the 235 perform with the 700R4 right after the installation, in your opinion?
Even though the extra gears, which are fairly close together, will help get a little more out of the 235, there is probably a measurable loss of power due to the nature of a stock automatic transmission. Did you notice anything like this when you test drove it?
Was the buyer happy with the performance prior to the sudden failure?
The reason for all of these questions is because if there wasn't much in the way of added performance from the addition of this combination of dual carbs and 700R4, then I wouldn't expect much more from a 261 with this setup. So if your buyer wants more power which he can feel, then you will need to go with a V8. If you up-sell power steering, air conditioning, with a serpentine belt setup, you might be able to charge him enough to come out ahead with the engine plant change.
Carl
