What's strange is that with the Edelbrock headed 408 the car would pick the front end up 12" or so and carry it out about 15-20' and you'd never feel it set down. With the 434 it picked almost .3 and 6 mph in the 1/8, even with the battery moved to the trunk it barely picks the front tires up. That old cheap 9.5" Edge Racing converter worked well for a while behind the 408, then it didn't. LOL