You should be able to pull low 13's on a 75 shot with drag radials. Or you could just get a new clutch/flywheel setup, and then you'd be there. If not, you can run 100 shot on the stock block if it's properly tuned, and you have proper fuel and ignition components. If you want to build the motor, I would resleeve the block, get forged rods of your choice, forged pistons (stock compression of 10:1), balance/micropolish the crankshaft, stainless steel valves. MSD 6a ignition, Jacobs Nitrous Mastermind (progressive nitrous controller that also controls timing and minor fuel adjustments), inline fuel pump, and get it dyno tuned.