"As far as the foot-to-the-pedal experience, there's a world of difference there, too," Hardy concludes. "The blown L98 had a limited powerband of 2,500-4,700 rpm, but the LS engine comes on strong at 1,500 and pulls right up to 6,000. If I could go back and do it again, I'd swap the L98 for an LS engine as quickly as I could. If I ever own another performance-based C4, it won't be without an LS of its own."

L98 to LS1 Conversion
L98 to LS1 Conversion BUILDUP WORKSHEET
LS1 block, rotating assembly, heads, $750
intake, coil packs, misc.
Engine build, cam, and cam install $1,100
Wiring harness $800
ECM $90
Throttle body $150
Headers $800
Torque converter $700
Motor mount plates (pair) $100
Misc. installation costs and supplies $200
Total $4,690