The 177 on a 350 will make good power. My suggestion is to find a reverse dome/D-shaped dome piston in the 8.5-9.0 CR range. Use some good aluminum 64cc chamber heads with 180-200cc runners. Use a nitrous/blower grind type cam in the 236 degree@.050 range. Run a tight quench area to stop detonation and it will be one tuff combo.