Advice: 2001 S281 SC - Build it up or leave it alone & sell

[S281SC-95]

So I am at point of power to where i either need to build my engine or sell it as is and start over. I have a 01 281-SC that has a steigy ported blower, Cams, Full Exhaust, Fuel System with some good supporting mods. At about 14 psi i pushing the limits of the stock short block and i am considering doing a Twin Turbo Termi Swap... The car has 56K miles with all the mods done around 50K and i have had mustangs my whole life but new to the Saleens. If i do this build is it going to kill the value and/or be hard to sell? is the value already gone with the mods i have done? i love the car and dont plan on selling it but if that was the case i would just sell it and pick up a coyote to put twins on as i do tend to rotate cars every couple years just to start fresh builds. Just curious as to how these things hold value stock vs slightly modded vs heavily modded.. I would hate to kill a great car just because i want to go fast.


Thanks for any advice, Tyler