What was the last year for the slant?

It is possible to make a 90 degree v6 that is smooth as silk and has a high redline. Gm just never has had the best powertrain engineers. The engine family in this link powered luxury cars and 8000+rpm supercars and all were 90 degree v6's. I have driven the 3.2 and 3.5 variants and they are smooooth. http://en.wikipedia.org/wiki/Honda_C_engine