Having a new set of heads like the Airwolf 220 small block heads I think greatly dimishes the "need" to do a big block A body, you basically have an affordable small block head that flows comparable to a mildly well ported Edelbrock, so that to my thinking means a 416 small block should have very comparable power to weight performance to a 449-451 inch big block of comparable head flow.

For anybody who has not driven a mild high torque moderate rpm stroker small block torque motor, it drives as well or better than a comparable or slightly higher cube big block. Torque is cubes, power is the heads but power to weight ratios when equal in terms of torque curves almost always favor the lighter of the 2 combinations in terms of overall driving satisfaction. Plus regardless of p/w a lighter car reacts more predictably and stops quicker.