What did the motor dyno? I have a Ray Barton built 528 in my 71 Cuda. The car is very heavy 3950 lbs. I've run a best time of 9.88 @ 141 mph. If I work on the 60 ft times I should be able to run 9.50's or 60's.
Not all of Ray's 528's are built the same. Mine is a Mopar performance mega block and a pump gas motor with only 10.4 compression. High compression could give me almost another 100 hp.
You are going to be at a disadvantage with a stick shift and high gears but you still should be able to get into the 10's if you can hook it up.