Here is a link to the fastest/quickest slant six powered "door slamer" in the country. Turbo charged/fuel injected.
http://www.drakecoatings.com/DCI%20Racing.htm

How about a M-90 supercharged/FI slant six.
http://www.projectplato.com/cars/bigredhome.html

Charlie
65 Valiant 170 /6 turbo
66 Cuda 170 /6 Nitroused
66 Valiant 225 /6 Nitrous