Considering anything else besides this would be dumb. You say your car has a lot on sentimental (sp?) value? Go drive an LS1 car and you won’t give two shits about your V6 project anymore. Not bashing you or anything, it’s definitely real cool that you want to have a different setup than every other guy out there, but be prepared to spend a lot (if you want to do it right, and once) and not see impressive results.