Okay, for anyone who is interested, I got two different hydroboosts. One from a 94 Astro/Safari which comes off the firewall straight out and has two resorvoirs. The other from a 2000 Astro/Safari which tilt slightly downward and has only one resorvoir. I have test fitted both of them and other than having to drill two lower bolt holes, they fit very nicely and actually look really cool. I didn't hook up the brake pedal rod as that would have to be shortened a little. So if you are having vacuum problems or just plain fitment problems with a brake booster than either one of these will work fine for you.