Pappy,
I had a 385 series engine in my Superformace. It was bored and stroked to 588. It made 650 HP, and 720 Tq. I loved it. You will too. It pushes a bit in the corners.
and nailing the loud pedal at any speed or gear was always fun...and a bit dangerous.
But, get all of the RT suspension upgrades and you'll be fine.
Just do it.
BTW, Brent's figures and prices seem to be outstanding and excellent. If I was doing it again, he would be my first call.
All the best.