I think a p7100 can be had for 2k, the front cover and gear was 300, the lines were 450, the head has to come off and a tiny bit of grinding has to be done under the intake side so the pump will clear. Pop off pressure needs to be changed, that's about 100 dollars. I installed a fass system at first, that was about 600 or so. I think if a guy could get a deal on the pump it wouldn't be too bad money wise. Probably around $1700 or so for parts+ the p7100 and 2 or 3 days labor. I wouldn't convert a running truck. But when you are doing a transplant and don't want to have to change all the sensors and gauges and all the computer stuff. Well, it seemed like a good idea at the time. Plus I was having a hard time finding a low mileage 12 valve. I don't call 90k miles, low mileage. They do not all last 500k. Some are in sad shape at 120k. And CB is right. In a few years there will be electronic pumps that will be way better than the inline pump. But they will still stop working and give you some stupid error code in downtown jackass flats on a saturday night after everything is closed. If you need a tow back to civilization, call a first gen guy. And keep your rough ride comments to yourself.
Ron