You could build a stock stroke package that will make the number but it will take some compression which = premium fuel and a somewhat lumpy cam which might = a 3.55-3.73 rear gear. Maybe not a big deal but your highway cruise RPM is in the 3000+ range now.

OR you could build 500 cubes at 9:1 with aluminum heads and a cam with stockish idle quality and make the number on 87 regular.

The stroker will make major torque right off idle and that is what will shove your butt back in the seat and it will haul the mail even with a highway friendly gear, 2.94-3.23.

My 8.97:1 493 was making good torque by 1500 and was doing 500 ft/lbs by 2000 and peaked 600 @ 4000 and that was with a lumpy MP509 108 LSA cam.

Kevin