400 based 496, pocket ported Ed heads, 243@.050 mechanical flat tappet cam, 10.2 CR. EFI. Zero deck and .042 quench with "D" dish piston.

Truly "street driven" including summer trip from IL to CA and back in 9 days. Desert temps at sea level to freezing over 7500'. I ran the Silver State route backwards. Did fine.

Also run hard for extended laps on a road course.

With this combo, I would not want more compression for extended street or extended road course driving.