Can't burnout:(

doktor_x said
The drop in manifold vacuum with throttle application is normal. The harder you work the engine, the closer it moves to 0" hg. I wouldn't think the pedal should go stiff that quickly though.

My understanding of the potential hazard of starting a burnout in 1st is that if you back out of the throttle, the shock generated may scatter the sprag. I may be way off as I'm still getting my feet wet with how a TorqueFlite works.

Thats seems to make sense regarding what gear to start when attemtping a burnout. Defiently something to think about. Tomorrow i'll try disconnecting my booster hose and see what happens. Just weird, when I purchased this car it was nearly stock. Even had a 2.45 ring and pinion and 2-barrel carter. But I could still burnout with little effort. The brake pedal travel was always smooth. The first thing I noticed when I drove it with the rebuilt engine was the stiff brake pedal before completely stopping. Once I had 500miles broken into the engine I attempted to do a burnout and got absolutley nothing. Something is going on.