Got these from
www.dougrippie.com Haven't really heard much about his C4 work, but he does extensive C5 tuning though.
Here is a $12,500 package:
L-98 Engine
1985-91 Corvette
400 horsepower/490 ft-lbs.
383 cubic inches
Forged stroker crankshaft
Billet stroker rods
JE lightweight forged pistons
Plasma-moly file fit rings
Performance engine bearings
Cylinders bored oversized
Cylinders torque plate honed
Cylinder block square decked
Line honed main bores
Balanced rotating assembly
Ported cylinder heads
High flow stainless valves Performance valve springs
Chrome moly pushrods
1.6 intake and 1.5 exhaust
roller rocker arms
DRM custom camshaft
High performance timing set
58mm throttle body
K&N air filter
Modified air filter lid
High volume fuel pump
Adjustable fuel pressure regulator
Full length headers
Custom computer calibration
And here is the $5995 package:
L-98 Engine
1985-91 Corvette
340 horsepower/425 ft-lbs.
350 cubic inches
Ported cylinder heads
High flow stainless valves
Performance valve springs
Chrome moly pushrods
DRM custom camshaft
K&N air filter
Modified air filter lid
Adjustable fuel pressure regulator
Ported exhaust manifolds
Custom computer calibration