In case anyone was wondering what happened to my project everything went really well as far as the machining. First thing though I'm going to conclude is I would never recommend this pump ever to any TR3/4 owner. We did the machining of the key-way in the water pump shaft, made the collar for the broaching tool to cut the key-way in the bushing for the pulley. Which got pressed and glued in with a Lock Tight type product for bearing races. We honed the bushing too have a tight fit on the shaft and all was good until disaster hit. Upon fitting the pulley at home before installation I decided to hone it out a bit more and had to use a drift punch to knock the shaft out of the pulley. Well it popped out and highly hit the vise and cracked the impeller in half. I was done there and a few things flew across the shop. The casting on the impeller is so thin (maybe less the a 1/16") and week it only took a light bump to brake it. So I went to my Moss distributor and bought a new Gold original style pump 4 bladed and a used pulley. All is running now with no leaks but it was very noisy at first. Temperature is running a bit cooler the 185. More like 175. I was concerned on the temp of the 6 bladed pump that I replaced because it never came to full temp. About 180. So I have to check this out. My old one (30+ years old) ran spot on at 185 constantly. So I don't what could have happened.