Front clipping my car and thinking about lowering the engine in the car. What is a good spot to be for a 2400lb race ready car 50/50 weight bias? 632 1125hp and have the option of 1.80 or 1.65 glide, will be 4.56-4.86 rear gear 33x15 or 32x16 slick. Would it be different if running a 32x14 radial?
Thanks in advance for any input.

Because you are upgrading to a powerful engine and your car is relatively lightweight, your question is valid and important. I suggest finding other cars with similar performance and weight. Plus, maybe talk with chassis builders. I think good research by experienced builders is vital. Another, I have enjoyed a good relationship with Dave Connolley at Competitive Suspensions and Tod Bevis at Modern Race Cars.

Another thing, Mr. Inferno: in my experience, a 1.80 Powerglide works very well across a wide range of conditions and packages. I think you will be leaving ET on the table with a lesser ratio.

My 'fast' bracket car was a lot more efficient with 4.56 x 1.69 combination compared to 4.29 x 1.80 - the starting line ratio was basically the same, but the converter slippage out the back improved greatly - this was going 480 on HP and 430 - 445 on nitrous