Consumer cost of all the stuff they are removing is probably $3K at most. The LS7 costs about $6K more than an LSA. So right there you have $3K more than a ZL1. Add all the other goodies and I'm thinking we are probably talking about at least $59K without A/C.
EFR Twin Turbo LFX-GPI Tune-ZL1 fuel pump-10:1 CR forged pistons-3.45 gear-Meth Injection-BMR Trailing Arms, Bushings & Sway Bars-CircleD 4000 Stall-GPI Fuel Enrichment System
647 RWHP & 726 RWTQ @18.5 psi on 93 Octane (locked converter)
1/8 mile -- 7.158 @ 102.10 (20psi); old build