Will this kill my 904 ?

Way to much gear for the weight and low first gear. I would think more on the lines of 3.73 rear. I had a similar problem with my 67 Super Gas Barracuda @2615 lbs and a 727 it would leave so hard I would break wheelie bars and then scrub the rear valance off. Even with 16x33x15 slicks and 4.88 gear. I lost more races in the first 60'.
Went to a 1.76 glide 4200 converter. Car would leave with front end 6-8" off the ground, 60 ft 1.25 and picked up 1/10 in the 1/8th. best of 5.74. And I started winning. Car was a pleasure to drive.