If you mean Quick77R/T's motor...yeah that's very close to what I'd call a Stage III level iron head street motor.

As Mark says machineing and block prep are key... and not just in getting the motor to 1 -1.2hp/cube, but to getting it to stay together.

One thing I mention in the manual is that the SB mopar has a better port cross section-to-cylinder volume ratio compared to our 440 big block....alos another nice feature is that the cam tunnel is raised in the block which minimizes crank/cam windage, allows more rod room for strokers and aluminum rods and an added benefit is it makes the pushrods proportionally shorter/stronger and lighter which makes for nice higher RPM (but not too high because the geometry could be better, lol) potential.

I'd go as far as to say that if you are looking to go say as quick as mid high 11's with a factory iron head, It's easier and cheaper to do with an A engine A body than it is with a B/RB engine, B/E body and in the case of the still plentiful 360, it makes for a torquey, very streetable combo.