A500 or 727 with GV?

I agree, the lock up converter is nicer...helps with about 5% fuel economy and helps keep the tranny cooler which helps your tranny last longer. I'm all for the lock up. I found a place that has rebuilt 518's with the conversion kit and beefed up to handle 500hp easily, comes out to $2550. Cheaper than a GV and has the lock up converter. I may just go this route. They said they did an A body Dart with no tunnel conversion needed for the 518. The body mounts were fresh so there was no need for the tunnel to be touched. The cross member still does need to be modified along with drive shaft of course.

Thanks for the help guys.
-Mark