[RSBob]

Unless you are leaving the sheet metal alone - and making only reversible changes, you will be throwing away $15-$25,000 by altering an increasingly rare, sought after car. I would start with a T and go wild, but altering an S flushing thousands down the toilet.

If you sold the S, and bought a T in similar condition, that would help make you money for a good amount of your mods and help preserve a valuable car - but then if you did chop it - you are only increasing the value of remaining Ss.