Before you plunk down $$$ do some research, in a very high percentage of the installs there was little to no gains, for many it was a total waste of $$$. But many like to open the engine box to show folks something that looks cool but does not really work. That being said if you intend on some decent engine mods, then you will see some benefit even then not as much as you think. For about the same $$ slap a shorty on it and get decent speed gains!
No matter what your beliefs are "GOD BLESS AMERICA"
Fully retired marine tech near 60 years in the biz.