I would install them on my own car, see how they do? Bit of work but not too bad. You probably get very quick at after the second or third one. In fact I may 'try this at home' with my own 10+ pumps one day.
P.s. yesterday I had to double-check the new timing belt install on my '86 300ZX as it was not running right after I did the initial job on Saturday (turned out to be two spark plug wires had quietly halfway unseated from the distributor cap, duh). The original installation took me easily 7 or 8 hours, as it was the first time for me installing a new timing belt + tensioner. Lots of staring into the engine bay, thinking. Yesterday it took maybe three hours. I remembered the sequence of steps, which tools to use for what, even down to all the bolt sizes.