I really LOVE my vintage air unit. I have to turn it down after about 10 minutes. Make sure you have a good 4 core radiator and a good clutch fan, or electric fans! My truck is currently running a little hot, but I've got a 7 blade clutch fan on the way, if that doesn't fix it, I'm going electric!
I also had to add several hundred dollars to the cost of my kit. I had my system purged (sucked out) by a shop plus the cost of the R-134A, belts, etc. I also had to buy several tools. I bought a dremel to cut out the center vent and a couple hole saw bits ( $25 for two of 'em at lowes!) I also swapped to a short water pump and had to put my alternator on the DS. If I EVER get some free time I'm going to do a complete write up on the install, I have like 150 pictures
I work so friggin much, that's where I am now... sigh... 14 hour days....