i know for fact the 1.5" track will clear if you change the drivers to 8t vs the stock 9t. been there, done that. never tried the 1.75, but it would probably clear as well with the 8t.
however, the additional 15" of track length will equate to needing some sort of tunnel extension as well as rail extensions somewhere around 7.5".
rail extensions are easily aquired, the tunnel extension is another story.
as far as i know there are no aftermarket companies producing tunnel extensions for your sled. this leaves you with only a couple of options. first would be custom fabrication, second would be the availability of factory parts from any 94-96 ST model vmax, ie., the tunnel extension, if its still available.
nice upgrade to your sled. a bit inhibitive for easyness, but can be done.