No digi clusters for us. Sucks I know. As for dropping pulley sizes, to run a 3.5-3.4, you'll need 180 t-stat, autolite 104 plugs, down pipe, intake, and a really good tune. If you drop pulleys before hand, you'll have so much kr you'll be loosing hp. Find a way to scan for kr as your doing your mods also. You'll want to mod, scan, mod,scan, etc.