John,
What engine are you running with your guidelines?
The 307 has done great so far, espescially after adding the Rochester Q-jet and throwing out the old stock carb. The Q-jet is from a 350 and can cause the engine to stumble if you stomp it to the floor from idle due to the difference in CI. I've been driving it that way for a few years now and seldom do I have a need to open the secondaries on it. It gets good mileage, between 14-16 mpg for all around driving and about the same carrying a 1K pounds of material around town. Over 1,500 pnds and fuel economy definately suffers. I think with the added addition of CI from a 350 plus the 700r4, the combo will be great.
I believe it has 29-30" tires on it.
Thanks, Jeff