[KingLT1]

It isn't any different than putting 20-30k into a ZL1. There are lots of modded ZL1's for sale that have 20-30k in them listed for as much or less than buying a stock one. The OP mentioned eventually wanting 900whp from a ZL1. That will take 20+k to get there. His current SS is only a Supercharger and fuel system away from 700whp. The trans and stock bottom end will hold that. The cam that is in the car now bleeds off enough dynamic compression it will actually have a wider tuning window vs a stock cam car. So do the supercharger and fueling fist. Put a forged bottom end and build trans later when you want the 900. It will cost less to hit these power goals with the SS in this case.

Again, If the OP was still stock, yes it makes all the sense to go to the ZL1. But sense he is upside down already on it, might as well keep modding it.

Now if you just want a ZL1 because the grass looks greener on the other side, then cool! They are nice cars for sure!!