That car should run mid 10's with ease. Had a W2 headed 378 with a mild port job that ran 10.68 20 years ago at 3400 lbs. You should have the torque to handle the gear and converter sense it is a 4.00" stroke. I ran a 4.10 gear with a 4400 TA 8" converter.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
