I think it might have something to do with the tranny. The tranny is going south on me. It seems that if it slips, it will shift at like 2800 with it on the floor going from 1-2. If its normal... or so I think is normal... It will shift around 3300. Who knows. My buddies 96 MAF 351 shifts from 1-2 at about 5500 mashed to the floor.